Hisense Inverter-Driven Multi-Split Heat Pump / Air Conditioner P00397Q User Manual

2. Place the Manifold Pipe lower than the outdoor unit piping connection.
In case that the Manifold Pipe is placed higher than the outdoor unit piping connection, keep 300mm (max.) between the Manifold Pipe and the bottom of the outdoor unit. Also, provide the oil trap (min. 200mm) between the Manifold Pipe and the outdoor unit.

3. In case that the piping length between outdoor units is 2m or more, the oil trap should be provided for the gas pipe so that accumulation of refrigerant oil may not occur.

• Less than 2m                                     * 2m or More

4. Place the outdoor unit pipe horizontally or with downward gradient towards the indoor unit side, or refrigerant oil may accumulate in the pipe.

Refrigerant oil accumulates in the pipe.

5. For servicing, in case that the pipe is placed frontward of the outdoor unit, secure min. 500mm between the outdoor unit and Manifold Pipe. (When the compressor is replaced, a space of min. 500mm is required.)

6. Direction of Manifold Pipe
Place the Manifold Pipe vertically towards the ground (within +15o) as shown in the figure.

6.4 Piping Connection

Perform the piping connection work for each outdoor unit.
NOTE:
Ensure that the refrigerant pipe should be connected to the same refrigerant cycle unit.
● Prepare the refrigerant pipe in the field for the piping work.
Refer to Fig. 6.1 for the position of piping connection.

Fig. 6.1 Refrigerant Piping Connection

• Piping Direction

Fix the pipes adequately in order to avoid vibration and excessive force to the valve.

1. The pipes are available to connect in three directions (front, rear or bottom side) from the bottom base. For the vibration protection, properly fix the piping connection and check that no excessive force applied to the stop valve.
   

2. Operation of the stop valve should be performed.

3. Connect the pipes according to Table 5.1 and this “Installation & Maintenance Manual”.

4. Completely seal the penetration part of the bottom pipe with insulation in order to prevent rain water entering into the conduit.

Piping Size for Base Unit

(φmm)

Model ( KBtu/h )|

86

| 96| 114| 136|

154

---|---|---|---|---|---
Piping Size|

a

|

Gas

| 19.05| 22.2| 25.4| 25.4|

28.6

Liquid| 9.53| 9.53| 12.7| 12.7|

12.7

Piping Size for Two Units Combination

< Figure for AVWT- 232U6SZ >

(Indoor Unit on Left Side)

(Indoor Unit on Right Side.)

(φmm)

Model| AVWT-182U6SZ| AVWT-190U6SZ| AVWT-210U6SZ| AVWT-232U6SZ| AVWT- 250U6SZ| AVWT-272U6S| AVWT-290U6SZ| AVWT-307U6SZ
---|---|---|---|---|---|---|---|---
Combination Unit| Outdoor Unit A| AVWT-96U6SR| AVWT-96U6SR| AVWT- 136U6SS| AVWT-136U6SS| AVWT-136U6SS| AVWT-136U6SS| AVWT-154U6SS| AVWT-154U6SS
Outdoor Unit B| AVWT-86U6SR| AVWT-96U6SR| AVWT-86U6SR| AVWT-96U6SR| AVWT- 114U6SR| AVWT-136U6SS| AVWT-136U6SS| AVWT-154U6SS
Manifold Pipe|

HFQ-M22F

|

HFQ-M32F

Piping Size| a|

Gas

| 28.6| 28.6| 28.6| 28.6| 31.75| 31.75| 31.75| 31.75

Liquid

| 15.88| 15.88| 15.88| 15.88| 19.05| 19.05| 19.05| 19.05

b

|

Gas

| 22.2| 22.2| 25.4| 25.4| 25.4| 25.4| 28.6| 28.6

Liquid

| 9.53| 9.53| 12.7| 12.7| 12.7| 12.7| 12.7| 12.7

c

|

Gas

| 19.05| 22.2| 19.05| 22 2| 25.4| 25.4| 25.4| 28.6

Liquid

| 9.53| 9.53| 9.53| 9.53| 12.7| 12.7| 12.7| 12.7

• Perform the installation of the outdoor unit and piping connection according to the figure.
  Refer to the table for the outdoor unit model, the Manifold Pipe model and the piping diameter

Piping Size for Three Units Combination

< Figure for AVWT- 365U6SZ >

(Indoor Unit on Left Side)

(Indoor Unit on Right Side)

(φmm)

Model| AVWT-328U6SZ| AVWT-345U6SZ| AVWT-365U6SZ| AVWT-386U6SZ| AVWT- 402U6SZ| AVWT-426U6SZ| AVWT-444U6SZ| AVWT-460U6SZ
---|---|---|---|---|---|---|---|---
Combination Unit| Outdoor Unit A| AVWT-154U6SS| AVWT-154U6SS| AVWT- 136U6SS| AVWT-154U6SS| AVWT-154U6SS| AVWT-154U6SS| AVWT-154U6SS| AVWT-154U6SS

Outdoor Unit B| AVWT-96U6SR| AVWT-96U6SR| AVWT-114U6SR| AVWT-114U6SR| AVWT- 136U6SS| AVWT-154U6SS| AVWT-154U6SS| AVWT-154U6SS
Outdoor Unit C| AVWT-86U6SR| AVWT-96U6SR| AVWT-114U6SR| AVWT-114U6SR| AVWT- 114U6SR| AVWT-114U6SR| AVWT-136U6SS| AVWT-154U6SS
Manifold Pipe 1|

HFQ-M32F

|

HFQ-M32F

Manifold Pipe 2|

HFQ-M22F

|

HFQ-M32F

Piping Size|

a

| Gas| 31.75| 38.1| 38.1| 38.1| 38.1| 38.1| 38.1| 38.1
Liquid| 19.05| 19.05| 19.05| 19.05| 19.05| 19.05| 19.05| 19.05

b

| Gas| 28.6| 28.6| 28.6| 28.6| 31.75| 31.75| 31.75| 31.75
Liquid| 15.88| 15.88| 15.88| 15.88| 19.05| 19.05| 19.05| 19.05

c

| Gas| 28.6| 28.6| 28.4| 28.6| 28.6| 28.6| 28.6| 28.6
Liquid| 12.7| 12.7| 12.7| 12.7| 12.7| 12.7| 12.7| 12.7

d

| Gas| 22.2| 22.2| 25.4| 25.4| 25.4| 28.6| 28.6| 28.6
Liquid| 9.53| 9.53| 12.7| 12.7| 12.7| 12.7| 12.7| 12.7

e

| Gas| 19.05| 22.2| 25.4| 25.4| 25.4| 25.4| 25.4| 28.6
Liquid| 9.53| 9.53| 12.7| 12.7| 12.7| 12.7| 12.7| 12.7

• Perform the installation of the outdoor unit and piping connection according to the figure.
  Refer to the table for the outdoor unit model, the Manifold Pipe model and the piping diameter.

Stop Valve

< Gas Valve >

1. Make sure that the all the spindles are closed completely.
2. Connect the charging hose to the service port and release gas from the gas pipe.
3. Cut the end of the closing pipe (F6.35) and check that no gas exists inside the gas pipe.
4. Remove the stop valve cover.
5. Remove the closing pipe from the brazing portion by using a burner. Pay attention to the flame from the burner not to burn the stop valve body.

      Fig. 6.2

CAUTION:

• Ensure that there is no gas inside the pipe when removing the closing pipe. Otherwise, the pipe may be blown out and it may lead to injury.
• Protect the return oil pipe and vibration proof of the compressor with the metal plate when using a burner.

The details of stop valves are as follows.

< Gas Valve >

< Liquid Valve >

CAUTION:

• Do not apply an abnormal big force to the spindle valve at the end of opening. The back seat construction is not provided.
• At the test run, fully open the spindle. If not fully opened, the devices will be damaged.

Piping Connection

1. Make sure that the stop valves are closed completely.(2) Protect the compressor and sound-proof cover with metal plate when brazing the gas pipe as sh
2. own in Fig. 6.2. Pay attention to the flame from the burner not to burn the stop valve body.
3. Connect the indoor unit and the outdoor unit with refrigerant piping. Prevent the refrigerant piping from touching weak parts of the building such as wall, ceiling, etc. (Abnormal sound may occur due to the vibration of the piping.).
4. As for the flaring work of the field pipe, use the specified tightening torque in Table 6.3. Put nitrogen gas into the pipe when brazing.
5. Insulate the gas pipe and liquid pipe completely.

Mount the piping cover equipped with the outdoor unit after the piping connection. If not, the unit may damaged due to snow or rain water entering.

Table. 6.3 Tightening Work of Flare Nut

Required Tightening Torque                                      (JIS B8607)

• Details of Stop Valve Piping Connection.

|
114 ( KBtu/h )| 136 ( KBtu/h )
|
154 ( KBtu/h )|
|

NOTES :

1. Ensure that the closing pipe of the gas stop valve (1 place) is removed firstly.
2. Refer to the item 6.2 for the flaring work.

• Manifold Pipe (Optional Parts)

Item

|

Operation Type

|

Applicable Outdoor Unit

|

Model

---|---|---|---

Outdoor Unit Model (KBtu/ h)

|

Outdoor Unit Number

Manifold Pipe| for Cooling/Heating Changeover Operation|

182 to 232

|

2

|

HFQ-M22F

250 to 307

|

2

|

HFQ-M32F

328 to 386

|

3

|

HFQ-M22F + HFQ-M32F

402 to 460

|

3

|

HFQ-M32F + HFQ-M32F

• Construction Example (In Case of AVWT-345U6SZ)
  Regarding the piping work for 190KBtu/h and over, refer to Installation & Maintenance Manual attached to the Manifold Pipe.

< Front Side or Rear Side Piping Connection >

**< Downward Piping Connection >

**

• Branch Pipe (Optional Parts)

First Branch

Outdoor Unit (KBtu/ h)|

Model

---|---
86 and 96|

HFQ-102F

114 and 154|

HFQ-162F

182 and 232|

HFQ-242F

250 and 460|

HFQ-302F

• Pipe Diameter and Branch Pipe after First Branch

Total Indoor Unit (KBtu/ h)

| Gas (φmm)| Liquid (φmm)|

Model

---|---|---|---
Lower than 57|

15.88

|

9.53

|

HFQ-102F

57 to 86|

19.05

|

9.53

86 to 114|

22.2

|

9.53

114 to 154|

25.4

|

12.7

|

HFQ-162F

154 to 172|

28.6

|

12.7

172 to 250|

28.6

|

15.88

|

HFQ-242F

250 to 345|

31.75

|

19.05

|

HFQ-302F

Over 345|

38.1

|

19.05

• Piping Size (φmm) and Branch Pipe Selection

Pipe Diameter for Outdoor Unit

Main Pipe Diameter
(Base Unit or Manifold Pipe 1 to First Branch)
[Branch Pipe of First Branch] (*2)

19.05

| 9.53
114|

22.2

| 9.53
And 136| 25.4| 12.7
154| 28.6| 12.7
182 to 232| 28.6| 15.88
250 to 328| 31.75| 19.05
345 to 460| 38.1| 19.05

*[Pipe Diameter after First Branch] (3)**

Total Indoor Unit (KBtu/ h)|

Gas

|

Liquid

---|---|---
Lower than 57|

15.88

|

9.53

57 to 86|

19.05

|

9.53

86 to 114|

22.2

|

9.53

114 to 154|

25.4

|

12.7

154 to 172|

28.6

|

12.7

172 to 250|

28.6

|

15.88

250 to 345|

31.75

|

19.05

Over 345|

38.1

|

19.05

[Pipe Diameter between Branch Pipe and Indoor Unit] (*4)

12.7

|

6.35 (*5)

17 to 18|

15.88

|

6.35 (*5)

22 to 54|

15.88

|

9.53

76|

19.05

|

9.53

96|

22.2

|

9.53

• Piping Work Conditions

Item

|

Mark

|

*Allowable Piping Length (7)**

---|---|---
≤ the recommended connectable number of Indoor Unit| ≥ the recommended connectable number of Indoor Unit
Total Piping Length| Total Liquid Piping Actual Length|

≤ 1,000m (*8)

|

≤ 300m

Maximum Piping Length| Actual Length|

L1

|

≤ 165m

|

≤ 165m

Equivalent Length
Maximum Piping Length between Branch Pipe of 1st Branch and Each Indoor Unit|

L2

|

≤ 190m

|

≤ 190m

≤ 90m

|

≤ 40m

Maximum Piping Length between Each Branch Pipe and Each Indoor Unit|

L3

|

≤ 40m

|

≤ 30m

Piping Length between Manifold Pipe 1 and Each Outdoor Unit|

H5

|

≤ 10m

|

≤ 10m

Height Difference between Outdoor Units and Indoor Units| O.U. is Higher

|

H1

|

≤ 50m

|

≤ 50m

O.U. is Lower|

≤ 40m

|

≤ 40m

Height Difference between Indoor Units|

H2

|

≤ 15m

|

≤ 15m

Height Difference between Outdoor Units|

H5

|

≤ 0.1m

|

≤ 0.1m

(1): The Manifold Pipe is counted from the indoor unit side (as Manifold Pipe 1).
(2): When the maximum length of the equivalent refrigerant pipe (L1) from the outdoor unit/Manifold Pipe 1 to the indoor unit is over 100m, the pipe size of gas/liquid line from the outdoor unit/Manifold Pipe 1 to first branch should be increased one size with the reducer (field-supplied).
(3): If the refrigerant piping length is more than 100m, no need to increase the pipe size after first branch. If the Branch Pipe size is larger than the first branch, adjust the Branch Pipe size to the first branch. In case that the selected pipe size after the first branch is larger than the pipe size before the first branch, use the same pipe size as before the branch.
(4): The pipe diameter should be the same as the indoor unit piping connection size.
(5): When the liquid piping length is longer than 15m, use F9.53 pipe and reducer (field-supplied).
(6): Keep the direct distance of 500mm or more after the Manifold Pipe.
(7): The condition of refrigerant piping installation is different depending on the connected indoor unit quantities.
(8): Allowable total piping length may become shorter than 1,000m due to the limitation of maximum additional refrigerant amount.

NOTES:

1. Check the gas pipe and liquid pipe are equivalent in terms of the piping length and piping system.
2. Use a Branch Pipe (system components) for the branch pipe of indoor unit.
3. Install the indoor unit and Branch Pipe according to each “Installation & Maintenance Manual”.
   If the piping length (L3) between each Branch Pipe and each indoor unit is considerably longer than other indoor unit, refrigerant may not flow well and also performance may be deteriorated compared to other models.
   (Recommended Piping Length: within 15m).

• Piping Branch Restriction
  Follow the table below when performing the field-supplied piping work.

Piping Length between Branch Pipe (First Branch) and Each Indoor Unit (L2).|

**Main Piping Branch ***

| Indoor Unit Capacity Ratio After Main Branch
---|---|---
Piping Length After Branch.| Number of Main Piping Branch.
≤ 40m|

a+b+c  ≤ 30m
or
d+e+f  ≤ 30m

|

without Limit

|

–

a+b+c  >  30m
and
d+e+f  >  30m

|

within 2

within 41m to 90m|

–

|

within 1 (Fig.1)

|

≥        40% (Fig.2)

Main piping branches are 2 portions.

Indoor unit capacity ratio is less than 40%.

Electrical Wiring

Warning:

• Turn OFF the main power switch to the indoor unit and the outdoor unit and wait for more than 3 minutes before electrical wiring work or a periodical check is performed.

• Check to ensure that the indoor fan and the outdoor fan have stopped before electrical wiring work or a periodical check is performed.

• Protect the wires, electrical parts, etc. from rats or other small animals.
  If not protected, rats may gnaw at unprotected parts and which may lead to a fire.

• Avoid the wirings from touching the refrigerant pipes, plate edges and electrical parts inside the unit. If not do, the wires will be damaged and at the worst, a fire will occur.

• Use a medium sensing speed type ELB (Earth Leakage Breaker, activation speed of 0.1 sec. or less). If not used, it will cause an electric shock or a fire.

• Fix the cables securely. External forces on the terminals could lead to a fire.

• Tighten screws according to the following torque.
  M4: 1.0 to 1.3 N-m
  M5: 2.0 to 2.4 N-m
  M6: 4.0 to 5.0 N-m
  M8: 9.0 to 11.0 N-m
  M10: 18.0 to 23.0 N-m

General Check

1. Make sure that the field-selected electrical components (main power switches, circuit breakers, wires, conduit connectors and wire terminals) have been properly selected according to the electrical data indicated in the Technical Catalog. Make sure that the components comply with National Electrical Code (NEC).
   Supply electrical power to each outdoor unit. An ELB, fuse and main switch should be used for each outdoor unit. If not, it will be cause of fire or electrical shock.
   The power supply for the indoor unit and outdoor unit should be provided separately.
   Connect a power supply wiring to each indoor unit group to be connected to the same outdoor unit.
   (Max. capacity of one indoor unit group is 250KBtu/h.)

2. Check to ensure that the power supply voltage is within ±10% of the rated voltage.
   If the power supply voltage is too low, the system cannot be started due to the voltage drop.

3. Check the size of the electrical wires.

4. In some cases, the packaged air conditioner may not be operated normally under the following cases.
   * In case that the packaged air conditioner is supplied with the same power transformer as the device with high electricity consumption
   In case that the power source wires for the device* and the packaged air conditioner are located close to each other.
   ***** (ex) Lift, container crane, rectifier for electric railway, inverter power device, arc furnace, electric furnace, large-sized induction motor and large-sized switch.
   For the cases mentioned above, induction surge of the power supply wiring for the packaged air conditioner may occur due to a rapid change in electricity consumption of the device and an activation of switch. Therefore check the field regulations and standards before performing electrical work in order to protect the power supply wiring for the packaged air conditioner.

5. Check to ensure that the earth wire of the outdoor unit.

Fig. 7.1 Wiring Connection

Electrical Wiring Connection

Warning: The ELB (earth leakage breaker), FUSE and S (main switch) must be installed to the each power source of outdoor unit. If not, it may cause of electrical shock or fire.

NOTE: Supply the power source of outdoor units and indoor units respectively

1. Power Source Wiring
   Supply the power sources to the each outdoor unit respectively. Power source wiring is fundamentally according to this method.
   
   ELB (Earth Leakage Breaker)
   FUSE
   S (Main Switch)
   Power Source Wiring (O.U.)
   Earth Wiring (O.U.)
   Transmission Wiring (O.U. ~ I.U.)
   Transmission Wiring (O.U. ~ O.U.)
   Power Source Wiring (I.U.)
   ***** Earth Wiring (I.U.)

2. The recommended wiring, ELB, breaker size are shown as follow
   ***** Field Minimum Wire Sizes for Power Source

Outdoor Unit (KBtu/ h)

|

Maximum Running Current
(A)

|

Power Source Cable Size

|

Transmitting Cable Size

|

Earth Wire EN60335-1 Size
(mm 2)

|

ELB

|

Fuse
(A)

---|---|---|---|---|---|---
EN60335-1 1
(mm2 )| EN60335-1 1
(mm2 )| Nominal Current
(A)| Nominal Sensitive Current
(mA)
86|

13

| 4| 0.75| 4| 20| 30|

50

96|

17

| 6| 0.75| 6| 60| 30|

30

114|

23

| 6| 0.75| 6| 40| 30|

40

136| 28| 10| 0.75| 10| 50| 30|

40

154|

31

| 10| 0.75| 10| 50| 30|

50

• Refer to the NOTES for selection of the power source cable size.
  ELB: Earthleakage Breaker.

NOTES:

1. 1. Follow local codes and regulations when selecting field wires.
2. The wire sizes marked with *1 in the above table are selected at the maximum current of the unit according to the European Standard, EN60335-1.Use the wires which are not lighter than the ordinary polychloroprene sheathed flexible cord (code designation H05RN-F).
3. Use a shielded cable for the transmitting circuit and connect it to ground.
4. In the case that power cables are connected in series, add each unit maximum current and select wires below.

According to EN60335-1

Current(A)

|

Wire Size(mm 2 )

i≤3|

1 ~ 2.5

3 < i ≤ 6|

1 ~ 2.5

6 < i ≤ 10|

1 ~ 2.5

10 < i ≤ 16|

1.5 ~ 4

16 < i ≤ 25|

2.5 ~ 6

25 < i ≤ 32|

4 ~ 10

32 < i ≤ 50|

6 ~ 16

50 < i ≤ 63|

10 ~  25

*2 : In the case that current exceeds 63A,Don’t series connection

CAUTION:
Install a multi-pole main switch with a space of 3.5mm or more between each phase.

NOTES:

1. When the power supply wiring is longer, select the minimum wiring size which the voltage drop is within 2%.

2. Power supply voltage should be satisfied with the followings.
   Supply Voltage: Rated Voltage within +10%
   Starting Voltage: Rated Voltage within -15%
   Operating Voltage: Rated Voltage within +10%
   Imbalance between Phases: within 3%

3. Do not connect the earth wire to the gas pipe, water pipe, lightening conductor.
   Gas Pipe: An explosion and ignition may occur when gas leaks.
   Water Pipe: There is no effect of earth wire when a hard vinyl pipe is used.
   Lightening Conductor: The earth electric potential abnormally increases when a lightening conductor is used.

Electrical Wiring for Outdoor Unit

Connect the electrical wirings according to the following figure.

1. Connect the power supply wires to L1, L2, L3, and N (for 380-415V) for the three phase power source on the terminal board TB1 and earth wire to the terminal in the electrical control box.
2. Connect the transmission wires between the outdoor and indoor units to the TB2 terminals 1 and 2 on the PCB1. As for the transmission wires between outdoor units in the same refrigerant cycle, connect them to the TB2 terminals 3 and 4 on the PCB1.
3. Tighten screws for the terminal board according to the following table. < Required Tightening Torque > **Size**|

Tightening Torque

---|---
M4|

1.0 to 1.3 N-m

M5|

2.0 to 2.4 N-m

M6|

4.0 to 5.0 N-m

M8|

9.0 to 11.0 N-m

M10|

18.0 to 23.0 N-m

4. When installing the unit in Australia, connect the both ends of shielded twist pair cable (remote control switch cable and transmission cable) to the earth as shown bellow.
   

CAUTIONS: Pay attention to the followings to run through the cables under the unit using conduit tube. (The pipe cover is required to remove before performing piping and wiring works.)

NOTES:

1. Do not lead the power supply wiring and transmission wiring through the same conduit tube. Moreover, keep at least 5cm between the power supply wiring and transmission wiring.
2. Cut cross line at rubber bush (accessory) and securely attach it to the knock-out hole for cable protecting.
3. Attach the pipe cover to avoid entering rats or other small animals into the unit.
4. Avoid the wirings from touching the refrigerant pipes, plate edges and electrical parts inside the unit.
5. Completely seal the end of conduit tube with sealing materials to avoid entering rain into the conduit tube.
6. Make a drain hole at the lowest part of the conduit tube.
   

CAUTIONS: Tightly secure the power source wiring using the cord clamp inside the unit.
NOTE: Fix the rubber bushes with adhesive when conduit tubes to the outdoor unit are not used.

7.4 Electrical Wiring Connection of Indoor Unit, Outdoor Unit
(1) Connect a power supply wiring to each outdoor unit. Connect an ELB, fuse and main switch (S) to each outdoor unit.
(2) Connect a power supply wiring to each indoor unit group to be connected to the same outdoor unit.
(Max. capacity of one indoor unit group is 250 KBtu/h.)
Connect an ELB, fuse and main switch (S) to each indoor unit group.
(3) Connect the transmission wiring between indoor units and outdoor units, as shown in Fig. 7.2 and 7.3.
(4) Connect the transmission wiring in the same refrigerant cycle unit. (In case that the refrigerant pipe of indoor unit is connected to the outdoor unit, connect the transmission wiring to the same indoor unit.) Connecting the refrigerant pipe and transmission wiring to the different refrigerant cycle systems may lead to malfunction.
(5) Use 2-Core lead wires such as shielded twist pair cable for the transmission wiring. (Do not use 3-Core or over.)
(6) Use the same kind of cables for the Hi-NET system of the same refrigerant cycle.
(7) The transmission wiring is required to be separated from the power supply wiring.
Keep at least 5cm between the transmission wiring and the power supply wiring, and also min. 1.5m between the transmission wiring and power supply wiring for other electrical device. If the above is not secured, put the power supply wiring into the metal conduit tube to separate from other wirings.
(8) Connect the following transmission wiring to the terminals 1 and 2 of TB2 in the outdoor unit A (main unit).
between outdoor unit and indoor unit
between outdoor unit and indoor unit in other refrigerant cycles
(9) Do not connect the power supply wiring to the terminal board for transmission wiring (TB2). Printed circuit board may be damaged.
(10) Connect the earth wire for the outdoor/indoor. The earth wiring work under the condition of 100Ω (max.) ground resistance should be performed by the qualified person.

* Transmission Wiring

NOTES:

1. For the combination units (182~460KBtu/h), DSW settings of Main and Sub are required.
2. Alarm occurs if the transmission wires between outdoor units are connected to the terminals 1 and 2 for Hi-NET II.
3. In case that alarm is indicated on the LCD of Main outdoor unit, follow the “7-segment” indication of the Main outdoor unit for checking.
4. Perform function setting from Main outdoor unit.
5. Maximum refrigerant groups with one central controller are 64.
   Maximum indoor units to be connected are 160.
   380-415V 3N~ 50Hz
   
   Fig. 7.2 Instruction for Electrical Wiring Connection

Dip Switch Setting of Outdoor Unit

TURN OFF all power sources before setting.
Without turning OFF, the switches do not work and the contents of the setting are invalid.
(However, DSW4-No.1, 2, 4 can be operated during power source is ON.)
The mark of “■” indicates the position of dip switches. Set the dip switches according to the Fig.7.4.

NOTE

• By using switch DSW4, the unit is started or stopped after 10 to 20 seconds after the switch is operated.
• Number this outdoor unit to distinguish from other outdoor units for service and maintenance.
  And write the number in the space right.

Fig. 7.4 DSW Setting

• Setting for Transmitting
  It is required to set the outdoor unit Nos., refrigerant cycle Nos. and end terminal resistance for this Hi-NET or Hi-NET II system.

• Setting of Outdoor Unit No.
  In case of the combination of base unit, set DSW6 as shown below.
  

• Setting of Refrigerant Cycle No.
  In the same refrigerant cycle, set the same refrigerant cycle No. for the outdoor unit and the indoor units as shown below.
  As for setting indoor unit refrigerant cycle No., set the RSW2 and DSW5 on the indoor unit PCB.
  
  
  Ex.: In Case of Setting Refrigerant Cycle No. 25
  
  Turn ON No. 2 pin
  
  Set Dial No.5.

• Setting of End Terminal Resistance
  Before shipment, No. 1 pin of DSW10 is set at the “ON” side. In the case that the outdoor units quantity in the same Hi-NET or Hi-NET II is 2 or more, set No. 1 pin of DSW10 at the “OFF” side from the 2nd refrigerant group outdoor unit. If only one outdoor unit is used, no setting is required.
  
  
  

• Function Setting
  External Input/Output and Function Setting
  Start of Setting
  Turn ON DSW4-No.4.
  Press PSW1 for 3 seconds or more.
  “Menu Mode” will be indicated. End of Setting
  Press PSW1 for 3 seconds or more.
  The display indication become to normal indication.
  Turn OFF DSW4-No.4.
  NOTE: Release “Menu Mode” after the setting is completed. Otherwise, the air conditioner may not operate appropriately.
  
  [External Input and Output Setting]
  By pressing the push-switches PSW3 ( ) and PSW5 ( ), the function No. can be selected. PSW4 ( ): forward, PSW2 ( ): backward Fill out the selected function setting No. in the space of the table as shown.

  < Example > **Item**|

SEG2

|

SEG1

|

SET

---|---|---|---
1.| Input Setting 1 CN17 [1-2 pin]| | |
2.| Input Setting 2 CN17 [2-3 pin]| | |
3.| Input Setting 3 CN18 [1-2 pin]| | |
4.| Output Setting 1 CN16 [1-2 pin]| | |
5.| Output Setting 2 CN16 [1-3 pin]| | |

(Setting Before Shipment)
Before shipping, the input/output function settings are specified to each input/output terminal according to above table. The details of function No. and external input/output settings are as shown below.
Setting of External Input and Output Function

Function No.|

Input

|

Output

---|---|---
1| Fixing Heating Operation Mode| Operation Signal
2| Fixing Cooling Operation Mode| Alarm Signal
3| Demand Stoppage| Compressor ON Signal
4| Outdoor Fan Motor Start/Stop| Defrost Signal
5| Forced Stoppage| –
6| Demand Current Control 40%| –
7| Demand Current Control 60%| –
8| Demand Current Control 70%| –
9| Demand Current Control 80%| –
10| Demand Current Control 100%| –
11| Low Noise Setting 1| –
12| Low Noise Setting 2| –
13| Low Noise Setting 3| –
0| No Setting| No Setting

The same input/output function setting can not be set to different input/output terminals.
If set, a setting of larger function number is became invalid.

Function Setting
By pressing the push-switches PSW3 ( ) and PSW5 ( ), the setting can be changed.
PSW4 ( ): forward, PSW2 ( ): backward Refer to the Technical Catalog for more details.
Fill out the selected function setting No. in the space of the table as shown.

Item

|

SEG2

|

SEG1

|

SET

---|---|---|---
1| Circulator at Heating Function Thermo-OFF| | |
2| Night-Shift| | |
3| Cancellation of Outdoor Ambient Temperature Limit| | |
4| Defrost for Cold Area (Change of Defrost Condition)| | |
5| SLo (Fan Speed) Defrost Setting| | |
6| Cancellation of Hot Start| | |
7| Priority Capacity Mode| | |
8| Compressor
Frequency ControlTarget Value for Cooling| | |
9| Compressor

Frequency Control

Target Value for Heating

| | |
10| Indoor Expansion Valve Control Target Value for Cooling| | |
11| Indoor Expansion Valve Control Target Value for Heating| | |
12| Not Prepared| | |
13| Not Prepared| | |
14| Not Prepared| | |
15| Not Prepared| | |
16| Not Prepared| | |
17| Not Prepared| | |
18| Demand| | |
19| Wave Function Setting| | |
20| Protection of Decrease in Outlet Temperature for Cooling| | |
21| Not Prepared| | |
22| Adjustment of Fan Rotation (for multiple installation)| | |
23| Not Prepared| | |
24| Not Prepared| | |
25| Not Prepared| | |
26| Not Prepared| | |

Additional Refrigerant Charge

Air-Tight Test

1. (1) Check to ensure that the stop valves are closed completely before air-tight test.
   < Tightening Check of Stop Valves >
   a) After connecting the pipe, remove the cap of stop valve for gas and liquid .
   Tighten the open-close spindle in the close direction with a torque 1).
   1)Stop Valve for Gas|

86 to 114

|

18 to 22 N-m

---|---|---

136 to 154

|

20 to 25 N-m

Stop Valve for Liquid|

7 to 9 N-m

b) Perform the air-tight test after the above check.
< Gas Valve >

Gas Valve

18 to 22

136 to 154|

20 to 25

**

2. Connect the indoor unit and the outdoor unit with field-supplied refrigerant piping.
   Suspend the refrigerant piping at specified points and prevent the refrigerant piping from touching weak parts of the building such as wall, ceiling, etc.
   (Abnormal sound may occur due to the vibration of the piping. Pay special attention in case of short piping length.)

3. Connect the gauge manifold using charging hoses with a vacuum pump or a nitrogen cylinder to the check joints of the liquid line and the gas line stop valves.
   Perform the air-tight test.
   Connect a manifold gauge to the check joints of the liquid and gas stop valves in the outdoor unit.
   Do not open the stop valves. Apply nitrogen gas pressure of 4.15MPa for Hi-Multi series.
   DANGER: Be sure to use Nitrogen Gas for air-tight test. If other gases such as oxygen gas, acetylene gas or fluorocarbon gas are accidentally used, it may cause explosion or gas intoxication. 

4. Check for any gas leakage at the flare nut connections, or brazed parts by gas leakage tester or by use of a foaming agent or gas leak detector.
   Recommended Forming Agent| Manufacturer
   ---|---
   Guproflex| Yokogawa & CO.,Ltd

5. Mount the piping cover equipped with the outdoor unit after connecting the pipe.

Fig. 8.1 Vacuum Pumping and Refrigerant Charge

Vacuuming

1. Connect a manifold gauge and vacuum pump to the check joints’ .
   ***** Gas Stop Valve
   Liquid Stop Valve

2. Continue vacuum pumping work until the pressure reaches -0.1MPa (-756mmHg) or lower for one to two hours.
   After vacuum pumping work, stop the manifold valve’s valve, stop the vacuum pump and leave it for one hour. Check to ensure that the pressure in the manifold gauge does not increase.

3. Tighten the cap of check joint (9 to 14N-m for gas valve, 14 to 18N-m for liquid valve) after the vacuum pumping work.

NOTES:

1. If tools or measuring instruments come into contact with the refrigerant, use the tools or the measuring instruments exclusive for R410A.
2. If vacuum degree of -0.1MPa (-756mmHg) is not available, it is considered that there is a gas leakage. Check for any gas leakage once again. If no leakage exists, operate the vacuum pump for one to two hours.

NOTICE:

• Insulate the refrigerant pipes as shown in Fig. 8.2. After connecting the refrigerant piping, seal the refrigerant pipes by using the field-supplied insulation material. Insulate the unions and flare nuts at the piping connections completely. Insulate the liquid piping and gas piping completely to avoid decreasing of performance and dewing on the surface of the pipe.
  
  Fig. 8.2 Insulation on Pipes

Additional Refrigerant Charge Calculation

Table 8.1 Additional Refrigerant Charge Calculation

Although refrigerant has been charged into this unit, additional refrigerant charge is required according to piping length.
Determine the additional refrigerant quantity according to the following procedure, and charge it into the system.
Record the additional refrigerant quantity to facilitate maintenance and servicing activities thereafter.

1. Calculating Method of Additional Refrigerant Charge (W kg).

Note: Ensure that the total additional charge should not be exceeded the max. additional refrigerant charge quantity as shown in the table below.
< Max. Additional Refrigerant Charge Quantity >
****Outdoor Unit (KBtu/ h)|

86/96

| 114| 136/154| 182| 190-232|

25-460

---|---|---|---|---|---|---
Max. Additional Ref. Charge Quantity (kg)|

28.0

| 33.0| 38.5|

42.0

|

46. 0

|

52.0

2. Charging Work
   Charge refrigerant (R410A) into the system according to Item 8.4.

3. Record of Additional Charge
   Total refrigerant charge of this system is calculated in the following formula.Total Ref. Charge =  W  +  Wo

This System = + = kg

Total Ref. Charge = W  kg

This System = + = kg

Date of Ref. Charge Work: / /

Ref. Charge Amount of O.U. Before Shipment (W0) kg

Outdoor Unit (KBtu/ h)

|

W0 Outdoor Unit Ref. Charge (kg)

---|---

86

| 6.5

96

|

6.5

144

|

9.9

136

|

9.0

154|

10.5

Note:
W0 is outdoor unit ref. charge before shipment.
In case of the combination of the base unit, calculate the total
ref. charge before shipment of the outdoor units to be combined.

Charging Work

After vacuum pumping work, check that the gas stop valve, and liquid stop valve are fully closed. Charge the additional refrigerant (refer to Table 8.1) from the check joint of liquid stop valve (Charging Refrigerant Amount Tolerance: 0.5kg).
If the specified refrigerant quantity can not be charged, follow the procedure below.

1. Fully open the stop valve for gas’ .
2. Operate the compressor at the cooling mode and add the refrigerant from the check joint of the liquid stop valve. At this time, the liquid stop valve is slightly opened (Charging Refrigerant Amount Tolerance: 0.5kg).

• Charge the correct refrigerant quantity according to Table 8.1. If not, a compressor may be damaged due to an excess or insufficient refrigerant charge.
• Refrigerant charge from check joint of gas stop valve may lead to compressor failure. Be sure to charge refrigerant from the check joint of liquid stop valve.
• Insulate the liquid piping and gas piping completely to avoid decreasing of performance and dewing on the surface of the pipe.
• Insulate the flare nut and union of the piping connection with insulation.
• Check to ensure that there is no gas leakage. If a large refrigerant leakage occurs, it will cause difficulty with breathing or harmful gases would occur if a fire was being used in the room.

Automatic Simple Judgement System for Refrigerant Amount

Perform the refrigerant amount check operation according to the automatic judgement function after the refrigerant charging work.
When the judgement result is excessive refrigerant, insufficient refrigerant or abnormal termination, find out the cause of abnormality and perform the refrigerant amount check operation again.
< Procedure of Refrigerant Amount Check Operation >

1. Reassemble all the cover except for the electrical control box cover and service cover of No.1 unit.

2. Turn ON the power supply of indoor unit and outdoor unit in the refrigerant cycle to be performed the refrigerant amount check operation.
   (Supply electrical power to the system 12 hours before starting this check operation to warm the compressor oil.)

3. Turn No.4 of DSW5 (PCB1) ON.
   7-segment Display
   

4. Check the 7-segment display and press PSW1.
   The outdoor fan and compressor will be activated and the 7-segment display will be indicated the following figure.
   
   The judgement takes 30 to 40 minutes.
   Refer to the table below for the result indication.
   When the judgement result is excessive refrigerant, insufficient refrigerant or abnormal termination, find out the cause of abnormality and perform the refrigerant amount check operation again.
   Judgement Result Indication 7-segment Indication|

Result

|

Remarks

---|---|---
|

Sufficient Refrigerant

| The refrigerant amount is sufficient.

Turn No.4 of DSW5 OFF and perform Test Run.

|

Excessive Refrigerant

| The refrigerant amount is excessive.

Calculate the additional refrigerant amount according to the piping length. Collect the refrigerant using a collector and charge the correct refrigerant amount.

|

Insufficient Refrigerant

| The refrigerant amount is insufficient.

Check if the additional refrigerant has been charged.

Calculate the additional refrigerant amount according to the piping length and charge the refrigerant.

|

Abnormal Termination

| Find out the cause of abnormal termination as shown below. After resolved the cause of abnormal termination, restart the check operation.

1. Is No.4 pin of DSW5 ON before turning on the power supply?
2. Are all indoor units ready and waiting, before turned ON No.4 pin of DSW5?
3. Is the outdoor ambient temperature within the applicable range (-5 to 43oC)? (In some cases, when the connected indoor unit number exceeds the recommended number and the outdoor ambient temperature exceeds 35oC, this check operation cannot be performed.)
4. Is the total indoor units operation capacity 30% (indoor units capacity ratio) or less?
5. (5) Is No.4 of DSW4 (compressor forced stoppage) OFF?  

5. Turn No.4 of DSW5 OFF when the refrigerant amount is sufficient.
   Wait 3 minutes (at least) after turning No.4 of DSW5 OFF and then the outdoor unit is ready to operate.
   NOTE: The 7-segment indication during the check operation may be changed to the protection control code by the activation of protection control, however it is normal. As for the protection control code, refer to the sheet attached to the inside of the outdoor unit service cover.

NOTE:

1. Emissions of the fluorocarbons are prohibited.
2. In case of disposal and maintenance of this product, collection of fluorocarbons is required.
3. Regarding the fluorocarbon, the specification label or refrigerant label attached to the product should be followed. After the additional refrigerant charge, record the total refrigerant (= refrigerant before shipment + additional refrigerant in the field) in the refrigerant label.

• Special Attention Regarding Refrigerant Gas Leakage
  Pay attention to the critical gas concentration to avoid accidental refrigerant gas leakage before installing air conditioning systems.
  * In case of KHK S 0010, this value should be decided according to the each country’s regulation such as ISO5149 and EN378.In the case that the calculated critical concentration is higher than 0.3kg/m3, take the following actions.

1. Provide a gas leakage detector and exhaust fan(s) controlled by its gas leakage detector.
2. Provide each effective opening at the wall or door for ventilation to next door so that the critical gas concentration can be maintained lower than the above value.
   (Provide an opening more than 0.15% of floor surface at the lower part of a door.)

CAUTION:

1. Maximum Permissible Concentration of HFC GAS R410A
   The refrigerant R410A is an incombustible and non-toxic gas.
   However, if leakage occurs and gas fills a room, it may cause suffocation. The maximum permissible concentration of HFC gas, R410A in air is 0.3kg/m3, according to the refrigeration and air conditioning facility standard (KHK S

10. by the KHK (High Pressure Gas Protection Association) Japan. Therefore, some effective measure must be taken to lower the R410A concentration in air below 0.3kg/m3 , in case of leakage.
    As for R410A, this consideration is applied similarly.

2. Calculation of Refrigerant Concentration
   (1) Calculate the total quantity of refrigerant R (kg) charged in the system connecting all the indoor units of
   objective rooms.
   (2) Calculate the room space where this unit is to be installed V (m3) of each objective room.
   (3) Calculate the refrigerant concentration C (kg/m3) of the room according to the following equation.
   R: Total Quantity of Charged Refrigerant (kg)

   ---

   V: Room Space Where This Unit Is to Be Installed (m3)
   = C: Refrigerant Concentration ≤ 0.3 (kg/m3) *
   If local codes or regulations are specified, follow them.

   Japanese Standard KHK S 0010 C=0.3 (kg/m3 )

Test Run

Test run should be performed according to the Item 9.2. And use the Table 9.1 for recording test run.

Warning:

• Do not operate the system until all the check points have been cleared.
  As for the test run of indoor unit, check “Installation & Maintenance Manual” attached to the indoor unit.

Before Test Run

1. Check to ensure that the refrigerant piping and transmission between outdoor unit and indoor units are connected to the same refrigerant cycle. If not, it will cause an abnormal operation and a serious accident.
   Check that the dip switch setting of the refrigerant cycle No. (DSW1 & RSW1 [O.U.], DSW5 & RSW2 [I.U.]) and the unit number (RSW) for the indoor units apply to the system.
   Confirm that the dip switch setting on the printed circuit board of the indoor units and the outdoor units are correct. Especially, pay attention to the setting of lift between indoor units and outdoor unit, the refrigerant No. and the end terminal resistance. Refer to the chapter “7. Electrical Wiring”.

2. Check to ensure that the electrical resistance is more than 1 megohm, by measuring the resistance between ground and the terminal of the electrical parts. If not, do not operate the system until the electrical leakage is found and repaired (Refer to “Caution for Insulation Resistance” for details.).
   Do not impress the voltage on the terminals for transmission (Outdoor Unit: TB2 1, 2, 3, 4 /Indoor Unit: TB2 1, 2, A, B / HCH Unit: TB2 1, 2, 3, 4).

3. Check to ensure that each wire, L1, L2, L3 and N is correctly connected at the power source.
   If incorrectly connected, the unit will not operate and the remote control switch will indicate the alarm code “05”. In this case, check and change the phase of the power source according to the attached sheet on the reverse side of the service cover.

4. Check to ensure that the switch on the main power source has been ON for more than 12 hours, to warm the compressor oil by the oil heater.
   FSXN series outdoor units does not operate within 4 hours after power supply (Stoppage Code d1-22).
   In case of operating within 4 hours, release the protection control as follows:
   1. Supply power to the outdoor unit.
   2. Wait for 30 seconds.
   3. Push PSW5 on the outdoor PCB more than 3 seconds in order to release the d1-22.
   In case of using remote control switch for release, push “Air Flow” and “Auto Louver” switch simultaneously for 3 seconds.

5. Main Unit Label
   In case of the combination of base units, attach the main unit label on a visible spot of the main unit (outdoor unit A) , so that the outdoor unit A can be identified easily. Do not attach the main label on the sub unit (outdoor unit B and C).

CAUTION:

Caution for Insulation Resistance
If total unit insulation resistance is lower than 1 megohm, the compressor insulation resistance may be low due to retained refrigerant in the compressor. This may occur if the unit has not been used
for long periods.

1. Disconnect the cables to the compressor and measure the insulation resistance of the compressor itself. If the resistance value is over 1 megohm, then insulation failure has occurred of other electrical parts.
2. If the insulation resistance is less than 1 megohm, disconnect the compressor cable from the inverter PCB. Then, turn on the main power to apply current to the crankcase heater.
   After applying current for more than 3 hours, measure insulation resistance again. (Depending on the air conditions, pipe length or refrigerant conditions, it may be necessary to apply the current for a longer period of time.) Check the insulation resistance and reconnect the compressor.
   If the leakage breaker is activated, check the recommended size shown in Table 7.1.

Notice:

1. Confirm that field-supplied electrical components (main switch fuse, fuse-free breaker, earth leakage breakers, wires, conduit connectors and wire terminals) have been properly selected according to the electrical data given in the Technical Catalog of the unit and ensure that the components comply with national and local codes.
2. Use shielded wires (>0.75mm2 ) for field wiring to protect electrically noise obstacle. (Total length of shielded wire shall be less then 1000m, and size of shielded wire shall comply with local codes.)
3. Check to ensure that the terminal for power source wiring (terminals “L1” to “L1” and “N” to “N” of each terminal board: AC 380-415V).
   If not, some component will be damaged.

Test Run

1. Check to ensure that the stop valves of the outdoor unit are fully opened and then start the system.
   (In case of the combination of base units, check that the stop valves of all the connected outdoor units are fully opened.)

2. Perform the test run of indoor units one by one sequentially and then check accordance of the
   refrigerant piping system and electrical wiring system. (If the multiple indoor units are operated simultaneously, the system can not be inspected the system accordance.)

3. Perform the test run according to the following procedure. Ensure that the test run is carried out without any problem.
   NOTE:
   In case of 2-remote control switch (main and sub), firstly perform the test run of the main remote control switch.
   a) Set the “TEST RUN” mode by pressing the “MODE” and “CHECK” switch of controller simultaneously for at least 3 seconds.
    ”TEST RUN” is displayed on the LCD.
   The total number of the indoor units connected is indicated on the LCD.
   Example when 5 indoor units are connected.
   Regarding other optional remote control switch (wireless remote control or half-size remote control), follow “Installation & Maintenance Manual” attached to each optional remote control switch and perform the test run.
   In case that the multiple indoor units are operated simultaneously controlled by one remote control switch, check the connected number of indoor unit is indicated on LCD.
   In case that the indicated number is not correct, the auto-address function is not performed correctly due to incorrect wiring, the electric noise or etc. Turn OFF the power supply and correct the wiring after checking the following points; (Do not repeat turning ON and OFF within 10 seconds.)
   Power Supply for Indoor Unit is Not Turned ON or Incorrect Wiring.
   Incorrect Connection of Connecting Cable between Indoor Units or Incorrect Connection of
   Controller Cable.
   Incorrect Setting of Rotary Switch and Dip Switch (The setting is overlapped.) on the Indoor
   Units PCB.
   b) Set the operation mode by pressing “MODE” switch.
   c) Press “RUN/STOP” switch.
   The operation lamp will be turned ON before the test run starts.
   2-hour OFF Timer will be set automatically, and “OFF Timer” and “2HR” will be indicated on
   LCD. Although the air flow initial setting is “HI”, the setting can be changed.
   Check the following operation range.| Cooling Operation| Heating Operation
   ---|---|---
   Indoor Temperature| Minimum| 21oC DB / 15oC WB| 15oC DB
   Maximum| 32oC DB / 23oC WB| 27oC DB
   Outdoor Temperature| Minimum| -5oC DB (*)| -20oC WB (**)
   Maximum| 43oC DB| 15oC WB

DB: Dry Bulb, WB: Wet Bulb
NOTES:
( * ) 10oC DB ~ -5oC DB, Operation Control Range
( ** ) -12oC WB ~ -20oC WB, Operation Control Range
* Pay attention to the following items while the system is running.
* Do not* touch any of the parts by hand at the discharge gas side, since the compressor chamber and the pipes at the discharge side are heated higher than 90°C.
DO NOT PUSH THE BUTTON OF THE MAGNETIC SWITCH(ES).
It will cause a serious accident.
* Do not* touch any electrical components for at least 3 minutes after turning OFF the main switch.
Check that the refrigerant piping setting and electrical wiring setting are for the same system, by operating the indoor unit one by one.
d) Depress “AUTO LOUVER” switch and check that the louver is activated normally without abnormal sound. Depress “AUTO LOUVER” again so that the louver will stop. If abnormal sound is heard, remove the panel and adjust the fitting condition of connection parts in the panel corner cover.
Ensure that the panel is mounted correctly to the unit body, otherwise the panel may be deformed.
e) The temperature control will be invalid though the protection device will be activated during the test run. If alarm occurs, find out the cause of abnormality according to Table 9.2 “Alarm Code”. And again perform the test run after solving the problems.
f) According to the label “Checking of Outdoor Unit by 7-segment Display on PCB1” attached to the rear side of the front cover of the outdoor unit, inspect temperature, pressure, operation frequency, and connected indoor unit numbers by the 7-segment displays.
g) To end the test run, wait for 2 hours or push “RUN/STOP” switch again.

Table 9.1 Test Run and Maintenance Record

MODEL:                                            SERIAL. No. COMPRESSOR MFG. No.                                       CUSTOMER’S NAME AND ADDRESS: DATE:

1. Is the rotation direction of the indoor fan correct?

2. Is the rotation direction of the outdoor fan correct?

3. Are there any abnormal compressor sounds?

4. Has the unit been operated at least twenty (20) minutes?

5. Check Room Temperature
   Inlet: No.1     DB/WB        oC, No.2     DB/WB     oC, No.3      DB/WB oC, No. 4        DB/WB     oC
   Outlet: DB     /WB     oC, DB      /WB    oC, DB      /WB      oC, DB      /WB oC
   Inlet: No. 5       DB/WB    oC, No. 6     DB/WB      oC, No.7     DB /WB oC, No.8      DB /WB       oC
   Outlet: DB /WB        oC, DB /WB        oC, DB /WB      oC,  DB /WB    oC

6. Check Outdoor Ambient Temperature
   Inlet: DB                        oC,      WB                         oC,
   Outlet: DB                         oC,  WB                         oC,

7. Check Refrigerant Temperature
   Liquid Temperature:                                              oC,
   Discharge Gas Temperature:                                             oC,

8. Check Pressure
   Discharge Pressure:                                             oC,
   Suction Pressure:                                              oC,

9. Check Voltage
   Rated Voltage:                                             V,
   Operating Voltage: L1 -L2                                            V,    L1 -L3                                            V, L2 -L3 V,
   Starting Voltage:                                             V,
   Phase Imbalance: 1 – V/Vm = ____

10. Check Compressor Input Running Current
    Input:                                              kW,
    Running Current:                                              A,

11. Is the refrigerant charge adequate?

12. Do the operation control devices operate correctly?

13. Do the safety devices operate correctly?

14. Has the unit been checked for refrigerant leakage?

15. Is the unit clean inside and outside?

16. Are all cabinet panels fixed?

17. Are all cabinet panels free from rattles?

18. Is the filter clean? 

19. Is the heat exchanger clean?

20. Are the stop valves open?

21. Does the drain water flow smoothly from the drain pipe?

Table 9.2 Alarm Code

Float Switch (High Water Level in Drain Pan, Abnormality of Drain Pipe, Float Switch or Drain Pan)
02| Outdoor Unit| Activation of Protection Device (High Pressure Cut)| Activation of PSH (Pipe Clogging, Excessive Refrigerant, Inert Gas Mixing)
03| Transmission| Abnormality between Indoor and Outdoor| Incorrect Wiring, Loose Terminals, Disconnect Wire, Blowout of Fuse, Outdoor Unit Power OFF
04| Abnormality between Inverter PCB and Outdoor PCB| Inverter PCB – Outdoor PCB Transmission Failure (Loose Connector, Wire Breaking, Blowout of Fuse)
04.| Abnormality between Fan Controller and Outdoor PCB| Fan Controller – Outdoor PCB Transmission Failure (Loose Connector, Wire Breaking, Blowout of Fuse)
05| Supply Phase| Abnormality Power Source Phases| Incorrect Power Source, Connection to Reversed Phase, Open-Phase
06| Voltage| Abnormal Inverter Voltage| Outdoor Voltage Drop, Insufficient Power Capacity
06.| Abnormal Fan Controller Voltage| Outdoor Voltage Drop, Insufficient Power Capacity
07| Cycle| Decrease in Discharge Gas Superheat| Excessive Refrigerant Charge, Failure of Thermistor, Incorrect Wiring, Incorrect Piping Connection, Expansion Valve Locking at Opened Position (Disconnect Connector)
08| Increase in Discharge Gas Temperature| Insufficient Refrigerant Charge, Pipe Clogging, Failure of Thermistor, Incorrect Wiring, Incorrect Piping Connection, Expansion Valve Locking at Closed Position (Disconnect Connector)
0A| Transmission| Abnormality between Outdoor and Outdoor| Incorrect Wiring, Breaking Wire, Loose Terminals
0b| Outdoor Unit| Incorrect Outdoor Unit Address Setting| Duplication of Address Setting for Outdoor Units (Sub Units) in Same Refrigerant Cycle System
0C| Incorrect Outdoor Unit Main Unit Setting| Two (or more) Outdoor Units Set as “Main Unit” Exist in Same Refrigerant Cycle System
11| Sensor on Indoor Unit| Inlet Air Thermistor| Incorrect Wiring, Disconnecting Wiring Breaking Wire, Short Circuit
12| Outlet Air Thermistor
13| Freeze Protection Thermistor
14| Gas Piping Thermistor
1| Fan Motor| Activation of Protection Device for Indoor Fan| Fan Motor Overheat, Locking
21| Sensor on Outdoor Unit| High Pressure Sensor| Incorrect Wiring, Disconnecting Wiring Breaking Wire, Short Circuit
22| Outdoor Air Thermistor
23| Discharge Gas Thermistor on Top of Compressor
24| Heat Exchanger Liquid Pipe Thermistor
25| Heat Exchanger Gas Pipe Thermistor
29| Low Pressure Sensor
31| System| Incorrect Capacity Setting of Outdoor Unit and Indoor Unit| Incorrect Capacity Code Setting of Combination Excessive or Insufficient Indoor Unit Total Capacity Code
35| Incorrect Setting of Indoor Unit No.| Duplication of Indoor Unit No. in same Ref. Gr
36| Incorrect of Indoor Unit Combination| Indoor Unit is Designed for R22
38| Abnormality of Picking up Circuit for Protection in Outdoor Unit| Failure of Protection Detecting Device (Incorrect Wiring of Outdoor PCB)
39| Compressor| Abnormality Running Current at Constant Speed Compressor| Overcurrent, Blowout Fuse, Current Sensor Failure, Instantaneous Power Failure, Voltage Drop, Abnormal Power Supply
3A| Outdoor Unit| Abnormality of Outdoor Unit Capacity| Outdoor Unit Capacity

1350KBtu/h
3b| Incorrect Setting of Outdoor Unit Models Combination or Voltage| Incorrect Setting of Main and Sub Unit(s) Combination or Voltage
3d| Abnormality Transmission between Main Unit and Sub Unit(s)| Incorrect Wiring, Disconnect Wire, Breaking Wire, PCB Failure
43| Protection Device| Activation of Low Pressure Decrease Protection Device| Defective Compression (Failure of Compressor of Inverter, Loose Power Supply Connection)
44| Activation of Low Pressure Increase Protection Device| Overload at Cooling, High Temperature at Heating, Expansion Valve Locking (Loose Connector)

45| Activation of High Pressure Increase Protection Device| Overload Operation (Clogging, Short-Pass), Pipe Clogging, Excessive Refrigerant, Inert Gas Mixing

47| Activation of Low Pressure Decrease Protection Device (Vacuum Operation Protection)| Insufficient Refrigerant, Refrigerant Piping, Clogging, Expansion Valve Locking at Open Position (Loose Connector)
48| Activation of Inverter Overcurrent Protection Device| Overload Operation, Compressor Failure
51| Sensor| Abnormal Inverter Current Sensor| Current Sensor Failure
53| Inverter| Inverter Error Signal Detection| Driver IC Error Signal Detection (Protection for Overcurrent, Low Voltage, Short Circuit)
54| Abnormality of Inverter Fin Temperature| Abnormal Inverter Fin Thermistor, Heat Exchanger Clogging, Fan Motor Failure
55| Inverter Failure| Inverter PCB Failure
57| Fan Controller| Activation of Fan Controller Protection| Driver IC Error Signal Detection (Protection for Overcurrent, Low Voltage, Short Circuit), Instantaneous Overcurrent
5A| Abnormality of Fan Controller Fin Temperature| Fin Thermistor Failure, Heat Exchanger Clogging, Fan Motor Failure
5b| Activation of Overcurrent Protection| Fan Motor Failure
5c| Abnormality of Fan Controller Sensor| Failure of Current Sensor (Instantaneous Overcurrent, Increase of Fin Temperature, Low Voltage, Earth Fault, Step-Out)
EE| Compressor| Compressor Protection Alarm (It is cannot be reset from remote Controller)| This alarm code appears when the following alarms occurs three times within 6 hours. 02, 07, 08, 39, 43 to 45, 47
b1| Outdoor Unit No. Setting| Incorrect Outdoor Unit Address Number or Unit Number Setting| Over 64 Number is Set for Address or Refrigerant Cycle.
B5| Indoor Unit No. Setting| Incorrect Indoor Unit Connection Number Setting| More than 17 Non-Corresponding to Hi-NET II Units are Connected to One System.

Safety and Control Device Setting

• Compressor Protection
  The compressor is protected by the following devices and their combinations.
  (1) High Pressure Switch: This switch cuts out the operation of the compressor when the discharge pressure exceeds the setting.
  (2) Oil Heater: This band type heater protects against oil foaming during cold starting, as it is energized while the compressor is stopped.
  
  

Hisense Inverter-Driven Multi-Split Heat Pump / Air Conditioner P00397Q User Manual – Download [optimized]
Hisense Inverter-Driven Multi-Split Heat Pump / Air Conditioner P00397Q User Manual – Download

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