HITACHI RAK-AH05PCASN/RAC-AH05PCASN Air Conditioning Instruction Manual

: June 11, 2024
: Hitachi

HITACHI RAK-AH05PCASN/RAC-AH05PCASN Air Conditioning

Product Information

The product is an air conditioning unit with a remote controller for easy operation. The model numbers available are RAK-AH05PCASN/RAC-AH05PCASN, RAK- AH10PCASN/RAC-AH10PCASN, RAK-AH13PCASN/RAC-AH13PCASN, and RAK-AH18PCASN/RAC- AH18PCASN. The air conditioning unit has various modes such as cooling, dry, fan only, heating, and auto. It also has a fan button to adjust the speed of the fan and a sleep button to set or cancel the Sleep Mode operation. The remote controller has several buttons such as ON/OFF, MODE, FAN, ROOM TEMPERATURE SETTING, MUTE, LIGHT, SLEEP, TIMER ON/OFF, CLOCK, SWING, IFEEL, ECO, CLEAN, and LOCK. Each button has a specific function to control the air conditioning unit.

Product Usage Instructions

To turn on/off the air conditioning unit, press the ON/OFF button on the remote controller.
To select the operation mode, press the MODE button on the remote controller. Each time the MODE button is pressed, the operation mode changes in sequence.
To adjust the speed of the fan, press the FAN button on the remote controller. Each time the FAN button is pressed, the fan speed changes in sequence.
To set or adjust the room temperature and timer, use the ROOM TEMPERATURE SETTING and TIMER ON/OFF buttons on the remote controller.
To mute the indoor unit display, press the MUTE button on the remote controller. Press it again to cancel the mute function.
To start or stop the fast cooling, press the TURBO button on the remote controller.
To start or stop vertical adjustment louver swinging and set the desired up/down airflow direction, use the SWING button on the remote controller.
To set or cancel Sleep Mode operation, use the SLEEP button on the remote controller.
To close the indoor unit display, press the LIGHT button on the remote controller.
To set the IFEEL mode operation, press the IFEEL button on the remote controller. Press it again to cancel the IFEEL function.
To set the current time, use the CLOCK button on the remote controller.
To set or cancel the timer operation, use the TIMER ON/OFF button on the remote controller.
To set or cancel Economy Mode operation, use the ECO button on the remote controller.
To start or stop horizontal adjustment louver swinging and set the desired left/right airflow direction, use the SWING button on the remote controller.
To save energy when stopping the air conditioner, cancel the IFEEL mode by pressing the ECO button on the remote controller.
To set the CLEAN function, use the CLEAN button on the remote controller.
To start or stop LOCK operation, press and hold the LOCK and + buttons together for 3 seconds.

MODEL

RAK-AH05PCASN/RAC-AH05PCASN
RAK-AH10PCASN/RAC-AH10PCASN
RAK-AH13PCASN/RAC-AH13PCASN
RAK-AH18PCASN/RAC-AH18PCASN

Remote controller

The remote controller transmits signals to the system.

1 ON/OFF BUTTON
The appliance will be started when it is energized or will be stopped when it is in operation, if you press this button.
2 MODE BUTTON
Press this button to select the operation mode.
3 FAN BUTTON
Used to select fan speed in sequence auto, high, medium or low
4,5 ROOM TEMPERATURE SETTING BUTTONS
Used to adjust the room temperature and the timer, also real time
6 TURBO BUTTON
Used to start or stop the fast cooling.(Fast cooling operates at high fan speed with 16oC set temp automatically).
7 SWING BUTTON
Used to stop or start vertical adjustment louver swinging and set the desired up/downairflow direction.
8 SLEEP BUTTON
Used to set or cancel Sleep Mode operation.
9 LIGHT BUTTON
When you press this button, all the display of indoor unit will be closed.
10 CLOCK BUTTON
Used to set the current time.
11,12 TIMER ON/OFF BUTTON
Used to set or cancel the timer operation.
13 ECO BUTTON
Used to set or cancel Economy Mode operation.
16 CLEAN BUTTON
Used to set the CLEAN function
14 SWING BUTTON
Used to stop or start Horizontal adjustment louver swinging and set the desired left/rightairflow direction.
15 MUTE BUTTON
Press it once,the MUTE function will be started.
Press it again, the MUTE function will be shut off.
17 IFEEL BUTTON
Used to set IFEEL mode operation. Press it once, the IFEEL function will be started. Press it again, the IFEEL function will be shut off.
If the IFEEL function can’t be shut off, please try to press this button about 5 seconds.
Advice to put the remote controller in the place where the indoor unit receive signal easily.
Advice to cancel the IFEEL mode so as to save energy when stopping the air conditioner.
11,12 LOCK
Press them together for 3 seconds to start or stop LOCKoperation

Indication symbols on LCD

Note: Each mode and relevant function will be further specified in following pages

Heating mode is NOT available for cooling only air conditioner
At “FAN ONLY” mode, only “Higher”,”High”,”Medium””Low” ”Lower” are available. and At “DRY” mode, Fan speed is set at “Auto” automatically, “FAN” button is ineffective in this case.

Setting temperature

“＋” Press once to raise temperature setting by 1℃
“－” Press once to lower temperature setting by 1℃

Range of available set temperature

*HEATING, COOLING| 16℃-30℃

Note: Heating mode is NOT available for cooling only models.
Note: Press and hold “ MODE ” button and “ -TEMP ” button together for 3 seconds will alternate the temperature display between the ℃ and °F scale.

Turning on

Press ON/OFF button, when the appliance receives the signal, the RUN indicator of the indoor unit lights up.

SWING, SMART, TIMER ON, TIMER OFF, CLOCK, SLEEP operation modes will be specified in the following pages.

Changing modes during operation, sometimes the unit does not response at once. Wait 3 minutes.
During heating operation, air flow is not discharged at the beginning. After 2—5 minutes, the air flow will be discharged until temperature of indoor heat exchanger rises.
Wait 3 minutes before restarting the appliance.

Airflow direction control

Vertical airflow(Horizontal airflow) is automatically adjusted to a certain angle in accordance with the operation mode after turning on the unit.

Operation mode	Direction of airflow
COOLING, DRY	horizontal
*HEATING, FAN ONLY	downward

The direction of airflow can be also adjusted to your own requirement by pressing the “SWING” button of the remote controller.

Heating mode is only available for heat pump models

Vertical airflow control
Using remote controller to set various angles of flow or specific angle as you like

Swinging airflow

Pressing button once, the vertical adjustment louver will swing up and down automatically.

Desired direction airflow

Pressing the button again when the louvers swing to a suitable angle as desired.

Horizontal airflow control
Using remote controller to set various angles of flow or specific angle as you like.

Swinging airflow
Pressing button once, the horizontal adjustment louver will swing left and right automatically.

Desired direction airflow
Pressing the button again when the louversswing to a suitable angle as desired.

NOTE: This function is to keep global format standardization and for this model isn’t available. You can adjust the horizontal airflow by yourself

A Do not turn the vertical adjustment louvers manually, otherwise malfunction may occur. If that happens, turn off the unit first and cut off the power supply, then restore power supply again.
B It is better not to let the vertical adjustment louver tilt downward for a long time at COOLING or DRY mode to prevent condensed water from dripping.

Installation instructions

Installation diagram

Above figure is only a simple presentation of the unit, it may not match the external appearance of the unit you purchased.
Installation must be performed in accordance with the national wiring standards by authorized personnel only.

Select the installation locations
Location for Installing Indoor Unit

Where there is no obstacle near the air outlet and air can be easily blown to every corner.
Where piping and wall hole can be easily arranged.
Keep the required space from the unit to the ceiling and wall according to the installation diagram on previous page.
Where the air filter can be easily removed.
Keep the unit and remote controller 1m or more apart from television, radio etc.
Keep as far as possible from fluorescent lamps.
Do not put anything near the air inlet to obstruct it from air absorption.
Install on a wall that is strong enough to bear the weight of the unit.
Install in a place that will not increase operation noise and vibration.
Keep away from direct sunlight and heating sources. Do not place flammable materials or combustion apparatuses on top of the unit

Location for Installing Outdoor Unit

Where it is convenient to install and well ventilated.
Avoid installing it where flammable gas could leak.
Keep the required distance apart from the wall.
The pipe length between indoor and outdoor unit should be not more than
meters in factory default status, but it can go up to maximum 15 meters with additional refrigerant charge.
Keep the outdoor unit away from greasy dirt, vulcanization gas exit.
Avoid installing it by the roadside where there is a risk of muddy water.
A fixed base where it is not subject to increased operation noise.
Where there is not any blockage of the air outlet.
Avoid installing under direct sunlight, in an aisle or sideway, or near heat sources and ventilation fans. Keep away from flammable materials, thick oil fog, and wet or uneven places.

Model| Max. allowed pipe length without additional

refrigerant (m)

| Limit of pipe length (m)| Limit of Elevation Difference H (m)| Required amount of

additional refrigerant (g/m)

---|---|---|---|---
5K~18K| 5| 15| 5| 20
21K~25K| 5| 15| 5| 30
28K~36K| 5| 15| 5| 40

If the height or pipe length is out of the scope of the table, please consult the dealer.

Indoor unit installation

Installing the Mounting Plate

Decide an installing location for the mounting plate according to the indoor unit location and pipe direction.
Keep the mounting plate horizontally with a horizontal ruler or level.
Drill holes of 32mm in depth on the wall for fixing the plate.
Insert the plastic plugs to the hole, fix the mounting plate with tapping screws.
Inspect if the mounting plate is well fixed. Then drill a hole for pipe.

Note: The shape of your mounting plate may be different from the one above, but the installation method is similar.
Note: As the above figure shown, the six holes matched with tapping screw on the mounting plate must be used to fix the mounting plate, the others are prepared.

Drill a Hole for Pipe

Decide the position of hole for pipe according to the location of mounting plate.
Drill a hole on the wall about 50mm. The holeshould tilt a little downward toward outside.
Install a sleeve through the wall hole to keep the wall tidy and clean.

Indoor Unit Pipe Installation

Put the pipes (liquid and gas pipe) and cables through the wall hole from outside or put them through from inside after indoor pipe and cables connection complete so as to connect to outdoor unit.
Decide whether saw the unloading piece off in accordance with the pipe direction.(as shownbelow)
After connecting pipe as required, install the drain hose. Then connect the power cords. After connecting, wrap the pipes, cords and drain hose together with thermal insulation materials

Pipe Joints Thermal Insulation:
Wrap the pipes joints with thermal insulation materials and then wrap with a vinyl tape.

Pipes Thermal Insulation:

a. Place the drain hose under the pipes.
b. Insulation material uses polythene foam over 6mm in thickness

Note : Drain hose is prepared by user

Drain pipe should point downward for easy drain flow. Do not arrange the drain pipe twisted, sticking out or wave around, do not immerse the end of it in water.
If an extension drain hose is connected to the drain pipe, make sure to thermal insulated when passing along the indoor unit.
When the pipes is directed to the right, pipes, power Cord and drain pipe should be thermal insulated and fixed onto the back of the unit with a pipe fixer.

Piping Connection:

a.Before unscrewing the big and the small sealing caps, press the small sealing cap with the finger until the exhaust noise stops, and then loosen the finger.
b.Connect indoor unit pipes with two wrenches. Pay special attentionto the allowed torque as shown below to prevent the pipes, connectors and flare nuts from being deformed and damaged.
c. Pre-tighten them with fingers at first, then use the wrenches.

If you don’t hear the exhaust noise, please contact with the merchant.

Model	Pipe size	Torque	Nut width	Min.thickness
5~12K,13~18K,21~24K	Liquid Side (φ6mm or 1/4 inch)	15~20N·m	17mm	0.5mm
18K#,22,24K#,28,30,36K	Liquid Side (φ9.53mm or 3/8 inch)	30~35N·m	22mm

0.6mm
5~10K,12K| Gas Side (φ9.53mm or 3/8 inch)| 30~35N·m| 22mm| 0.6mm
12K#,14,15,18K| Gas Side (φ12mm or 1/2 inch)| 50~55N·m| 24mm| 0.6mm
18K#,22,24,28,30,36K| Gas Side (φ16mm or 5/8 inch)| 60~65N·m| 27mm| 0.6mm
36K#| Gas Side (φ19mm or 3/4 inch)| 70~75N·m| 32mm| 1.0mm

Connecting of the Cable
Indoor Unit
Connect the power cord to the indoor unit by connecting the wires to the terminals on the controlboard individually in accordance with the outdoor unit connection.

Note: For some models, it is necessary to remove the cabinet to connect to the indoor unit terminal.
Outdoor Unit

Remove the access door from the unit by loosening the screw. Connect the wires to the terminals on the control board individually as follows.
Secure the power cord onto the control with cable clamp. board
Reinstall the access door to the original position with the screw.
Use a recognized circuit breaker for 24K model between the power source and the unit. A disconnecting device to adequately disconnect all supply lines must be fitted.

Caution:

Never fail to have an individual power circuit specifically for the air conditioner. As for the method of wiring, refer to the circuit diagram posted on the inside of the access door.
Comfirm that the cable thickness is as specified in the power source specification.
Check the wires and make sure that they are all tightly fastened after cable connection.
Be sure to install an earth leakage circuit breaker in wet or moist areas.

Cable Specifications

Capacity (Btu/h)| Power cord| Power connecting cord| Power connecting cord1| Main power supply
---|---|---|---|---
Type| Normal cross

– sectional area

| Type| Normal cross

– sectional area

| Type| Normal cross

– sectional area

5K~13K| H05VV-F| 0.75~1.5mm2X3| H07RN-F H05RN-F| 1.5mm2X3

0.75~1.0mm2X3

| H05RN-F| 0.75mm2X2

(Heat-pump)

| To indoor
14K~24K| H05VV-F| 1.5~2.5mm2X3| H07RN-F| 1.5~2.5mm2X3| H05RN-F| 0.75mm2X2

(Heat-pump)

| To indoor
18K~30K| H05VV-F| 1.5~2.5mm2X3| H07RN-F| 1.5~2.5mm2X4| H05RN-F| 0.75mm2X2

(Heat-pump&Optional)

1.0mm2X4Cooling only

| H05RN-F| 0.75mm2X3

(Heat-pump)

| To outdoor
24K~36K| H07RN-F| 2.5~4.0mm2X3| H05RN-F

H07RN-F

| 0.75mm2X4

1.0mm2X4

| H05RN-F| 0.75mm2X2

(Heat-pump&Optional)

| To outdoor
24K~36K| H07RN-F| 1.5mm2X5| H05RN-F| 0.75mm2X4| H05RN-F| 0.75mm2X2

(Heat-pump)

| To outdoor

NOTE: The cord may be different from the list above. It may be used as the next list. And it can be larger.0-6A, use 0.75mm or 18AWG. 0-10A, use 1mm or 16AWG. 0-16A, use 1.5mm or 14AWG 0-20A, use 2.5mm or 14AWG. 0-25A, use 2.5mm or 12AWG. 0-32A, use 4mm

Wiring diagram

Warning:
Before obtaining access to terminals, all supply circuits must be disconnected.
Make sure that the color of the wires in the outdoor unit and terminal No. are the same as those of the indoor unit, the details please refer to the wiring diagram which is near the terminal inside the unit.

Outdoor unit installation

Install Drain Port and Drain Hose (for heat-pump model only)
The condensate drains from the outdoor unit when the unit operates in heating mode. In order not to disturb your neighbor and protect the environment, install a drain port and a drain hose to direct the condensate water. Just install the drain port and rubber washer to the chassis of the outdoor unit,then connect a drain hose to the port as the right figure demonstrates.
Install and Fix Outdoor Unit Fix with bolts and nuts tightly on a flat and strong floor. If installed on the wall or roof, make sure to fix the supporter well to prevent it from shaking due to serious vibration or strong wind.
Outdoor Unit Piping Connection Remove the valve caps from the 2-way and 3-way valve. Connect the pipes to the 2-way and 3-way valves separately according to the required torque.
Outdoor Unit Cable Connection (see previous page)

Air purging

The air which contains moisture remaining in the refrigeration cycle may cause a malfunction on the compressor. After connecting the indoor and outdoorunits, release air and moisture from the refrigerant cycle using a vacuum pump, as shown below.
Note : To protect the environment be sure not to discharge the refrigerant to the air directly. How to Purge Air Tubes

Unscrew and remove caps from 2 and 3-way valves.
Unscrew and remove cap from service valve.
Connect vacuum pump flexible hose to the service valve.
Start vacuum pump for 10-15 minutes until reaching a vacuum of 100Pa absolutes.
With vacuum pump still running close the low pressure knob on vacuum pump manifold. Then stop the vacuum pump.
Open 2-way valve ,1/4 turn, then close it after 10 seconds. Check tightness of all joints using liquid soap or an electronic leak detector
Turn 2 and 3-way valves stem to fully open the valves. Disconnect the flexible vacuum pump hose.
Replace and tighten all valve caps.

Maintenance

Front panel maintenance Air filter maintenance

Protection

Operating condition
The protective device maybe trip and stop the appliance in the cases listed below

HEATING

| Outdoor air temperature is over 24oC
---|---
Outdoor air temperature is below -7oC
Room temperature is over 27oC
COOLING| *note
---|---
Room temperature is below 21oC
DRY| Room temperature is below 18oC

NOTE:

*Normally, the outdoor max temperature is 430C,but some models will be achieved 460C,480C ,or 500C.For Tropical ( T3) Climate condition models, the outdoor max temperature is 55 oc. The temperature of some products is allowed beyond the range. In specific situation, please consult the merchant. ff the air conditioner runs in COOLING or DRY mode withdoor or window opened for a long time when relative humidity is above 80%, dew may drip down from the outlet.

Noise pollution

Install the air conditioner at a place that can bear its weight in order to operate more quietly.
Install the outdoor unit at a place where the air discharged and the operation noise would not annoy your neighbors.
Do not place any obstacles in front of the air outlet of the outdoor unit lest it increases the noise level.

Features of protector

The protective device will work at following cases.
Restarting the unit at once after operation stops or changing mode during operation, you need to wait for 3 minutes.
Connect to power supply and turn on the unit atonce, it may start 20 seconds later.
If all operation has stopped, press ON/OFF button again to restart, Timer should be set again if it has been canceled.

Features of HEATING mode
Preheat
At the beginning of the HEATING operation, the airflow from the indoor unit is discharged 2-5 minutes later.

Defros
In HEATING operation the appliance will defrost (de-ice) automatically to raise efficiency. This procedure usually lasts 2-10 minutes. During defrosting, fans stop operation. After defrosting completes, it returns to HEATINGmode automatically.
Note : Heating is NOT available for cooling only air conditioner models.

Troubleshooting

The following cases may not always be a malfunction, please check it before asking for service.

Display introduction

Specifications in this document are subject to change without notice, in order that Hitachi-Johnson Controls Air Conditioning, Inc. may bring the latest innovations to their customers.
Hitachi-Johnson Controls Air Conditioning, Inc.
© 2022 Hitachi- Johnson Controls Air Conditioning, Inc. 2022.05 Version.A Printed in China