UNBRANDED 13+ SEER Extra High Efficiency Heat Pump Instruction Manual
- June 15, 2024
- UNBRANDED
Table of Contents
13+ SEER Extra High Efficiency Heat Pump
Instruction Manual
13+ SEER Extra High Efficiency Heat Pump
Outdoor Heat Pump
User’s Information/Installation Instructions
13 SEER R-410A High Efficiency Split System
These units have been designed and tested for capacity and efficiency in
accordance with A.R.I. Standards. Split System Heat Pump units are designed
for use with a wide variety of fossil fuel furnaces, electric furnaces, air
handlers, and evaporator coil combinations.
These instructions are primarily intended to assist qualified individuals
experienced in the proper installation of heating and/or air conditioning
appliances. Some local codes require licensed installation/service personnel
for this type of equipment. Read all instructions carefully before starting
the installation.
USER’S INFORMATION
IMPORTANT
Read this owner information to become familiar with the capabilities and use
of your appliance. Keep this with literature on other appliances where you
have easy access to it in the future. If a problem occurs, check the
instructions and follow recommendations given. If these suggestions don’t
eliminate your problem, call your servicing contractor.
Heat Pump Principle of Operation
WINTER HEATING
- Outdoor air enters heat pump.
- Cold, heat-transfer section (outdoor coil) extracts heat from outdoor air as refrigerant evaporates from a liquid to a gas.
- Refrigerant, compressed to a hot gas by heat pump, carries the heat to the hot heat transfer section (indoor coil).
- Hot, heat-transfer section (indoor coil) releases the heat to indoor air as refrigerant condenses from a gas to a liquid.
- Air handler circulates the heat throughout the home.
- Refrigerant returns to outdoor coil and evaporates once again to absorb more heat.
SUMMER COOLING
- Indoor air enters the air handler section.
- Cold, heat-transfer section (indoor coil) extracts heat from indoor air as refrigerant evaporates from a liquid to a cold gas.
- Refrigerant, drawn to heat pump and compressed to a hot gas by heat pump, carries the heat outdoors.
- Hot, heat-transfer section (outdoor coil) releases the heat as refrigerant condenses from a gas to a liquid.
- Heat pump (outdoor fan) discharges the heat to outside air.
- Refrigerant returns to indoor coil and evaporates once again to absorb more heat.
OPERATING INSTRUCTIONS
TO OPERATE YOUR HEAT PUMP FOR COOLING —
- Set the thermostat system switch to COOL and the thermostat fan switch to AUTO. (See Figure 1)
- Set the thermostat temperature to the desired temperature level using the temperature selector. Please refer to the separate detailed thermostat user’s manual for complete instructions regarding thermostat programming. The outdoor unit and indoor blower will both cycle on and off to maintain the indoor temperature at the desired cooling level.
NOTE: If the thermostat temperature level is re-adjusted, or the thermostat
system switch is repositioned, the outdoor unit may not start immediately. The
outdoor unit contains a protective timer circuit which holds the unit off for
approximately five minutes following a previous operation, or the interruption
of the main electrical power.
TO OPERATE YOUR HEAT PUMP FOR HEATING —
- Set the thermostat system switch to HEAT and the thermostat fan switch to AUTO. (See Figure 1)
- Set the thermostat temperature to the desired temperature level using the temperature selector. Please refer to the separate detailed thermostat user’s manual for complete instructions regarding thermostat programming. The outdoor unit and indoor blower will both cycle on and off to maintain the indoor temperature at the desired heating level.
NOTE: If the thermostat temperature level is re-adjusted, or the thermostat system switch is repositioned, the outdoor unit may not start immediately. The outdoor unit contains a protective timer circuit which holds the unit off for approximately fi ve minutes following a previous operation, or the interruption of the main electrical power.
Emergency Heat:
The thermostat includes a system switch position termed EM. HT. This is a
back-up heating mode to be used only if there is a suspected problem with the
outdoor unit. With the system switch set to EM. HT. the outdoor unit will be
locked off, and supplemental heat (typically electric resistance heating) will
be used as a source of heat. Sustained use of electric resistance heat in
place of the heat pump will result in an increase in electric utility costs.
Defrost:
During cold weather heating operation, the outdoor unit will develop a coating
of snow and ice on the heat transfer coil. This is normal, and the unit will
periodically defrost itself. During the defrost cycle, the outdoor fan will
stop, and the compressor will continue to run and heat the outdoor coil,
causing the snow and ice to melt. After the snow and ice have melted, some
steam may rise from the outdoor unit as the warm coil causes some melted frost
to evaporate. 
TO OPERATE YOUR HEAT PUMP FOR AUTOMATIC COOLING AND HEATING —
-
Set the thermostat system switch to AUTO and the thermostat fan switch to AUTO. (See Figure 1)
Note: Thermostats will vary. Some models will not include the AUTO mode, and others will have the AUTO in place of the HEAT and COOL, and some will include all three. -
Set the thermostat temperature to the desired heating and cooling temperature level(s). The outdoor unit and the indoor blower will then cycle on and off in either the heating or cooling mode of operation as required to automatically maintain the indoor temperature within the desired limits.
TO SHUT OFF YOUR HEAT PUMP —
Set the thermostat system switch to OFF and the thermostat fan switch to AUTO.
(See Figure 1) The system will not operate, regardless of the thermostat
temperature selector(s) setting.
TO OPERATE THE INDOOR BLOWER CONTINUOUSLY —
Set the thermostat fan switch to ON (See Figure
1). The indoor blower will start immediately, and will run continually until
the fan switch is reset to AUTO.
The continuous indoor blower operation can be obtained with the thermostat
system switch set in any position, including OFF.
The continuous indoor blower operation is typically used to circulate the
indoor air to equalize a temperature unbalance due to a sun load, cooking, or
fi replace operation.
TO MAINTAIN YOUR HEAT PUMP —
CAUTION:
Be certain the electrical power to the outdoor unit and the furnace/air
handler is disconnected before doing the following recommended maintenance.
-
Regularly:
a. Clean or replace the indoor air filter at the start of each heating and cooling season, and when an accumulation of dust and dirt is visible on the air filter. Inspect the filter monthly.
b. Remove any leaves and grass clippings from the coil in the outdoor unit, being careful not to damage the aluminum fins.
c. Check for any obstruction such as twigs, sticks, etc.
**CAUTION:**
Do not over-oil, or oil motors not factory-equipped with oil tubes. The compressor is hermetically “sealed” and does not require lubrication. -
Before Calling a Service Technician, Be Certain:
a. The unit thermostat is properly set — see “To Operate Your Heat Pump for Cooling” and “To Operate Your Heat Pump for Heating.”
b. The unit disconnect fuses are in good condition, and the electrical power to the unit is turned on.
Read Your Warranty
Please read the separate warranty document completely. It contains valuable
information about your system.
GENERAL INFORMATION
Read the following instructions completely before performing the installation.
CAUTION:
This unit uses refrigerant R-410A. DO NOT under any circumstances use any
other refrigerant besides R-410A in this unit. Use of another refrigerant will
damage this unit.
Outdoor Unit Section — Each outdoor unit is shipped with a refrigerant
charge adequate to operate the outdoor section with an indoor matching coil or
air handler. Units with braze connections include the proper amount of
refrigerant for an additional 15 ft. of refrigerant lines the same size as
the valve fittings.
NOTE: DO NOT USE ANY PORTION OF THE CHARGE FOR PURGING OR LEAK TESTING.
Matching coils and air handlers may be shipped with a small holding charge to
pressurize them to keep out contaminants. To release the pressure, read the
indoor section installation instructions carefully.
Liquid and Suction Lines — Fully annealed, refrigerant grade copper
tubing should be used when installing the system. Refrigerant suction line
tubing should be fully insulated.
Field Connections for Electrical Power
Supply — All wiring must comply with current provisions of the “National
Electrical Code” (ANSI/NFPA 70) and with applicable local codes having
jurisdiction. The minimum size of electrical conductors and circuit protection
must be in compliance with information listed on the outdoor unit data label.
NOTICE:
Certain models have external panels fabricated from a premium grade of
stainless steel designed to inhibit corrosion. For such units, if the unit is
located in a coastal region or other area subjected to high concentrations of
salt, then the unit should be hosed off after storms and monthly otherwise to
maintain its new appearance.
SAFETY CONSIDERATIONS
Pressures within the System — Split system heat pump equipment contains
liquid and gaseous refrigerant under pressure. Installation and servicing of
this equipment should be accomplished by qualified, trained personnel
thoroughly familiar with this type of equipment. Under no circumstances should
the Homeowner attempt to install and/or service the equipment.
Labels, Tags, Precautions — When working with this equipment, follow all
precautions in the literature, on tags, and on labels provided with the
equipment. Read and thoroughly understand the instructions provided with the
equipment prior to performing the installation and operational checkout of the
equipment.
Brazing Operations — Installation of equipment may require brazing
operations. Safety codes must be complied with. Safety equipment (e.g.; safety
glasses, work gloves, fi re extinguisher, etc.) must be used when performing
brazing operations.
WARNING:
Ensure all electrical power to the unit is off prior to installing or
servicing the equipment. Failure to do so may cause personal injury or death.
SITE PREPARATION
Unpacking Equipment — Remove the cardboard carton and User’s Manual from
the equipment. Take care to not damage tubing connections when removing from
the carton.
Inspect for Damage — Inspect the equipment for damage prior to installing
the equipment at the job site. Ensure coil fi ns are straight and, if
necessary, comb fi ns to remove flattened and bent fi ns.
Preferred Location of the Outdoor Unit at the Job Site — Conduct a survey
of the job site to determine the optimum location for mounting the outdoor
unit. Overhead obstructions, poorly ventilated areas, and areas subject to
accumulation of debris should be avoided. The outdoor unit must be installed
in such a manner that airflow through the coil is not obstructed and that the
unit can be serviced.
Facility Prerequisites — Electrical power supplied must be adequate for
proper operation of the equipment. The system must be wired and provided with
circuit protection in accordance with local building codes and the National
Electrical Code.
INSTALLING THE OUTDOOR UNIT
Slab Mount — The site selected for a slab mount installation requires a
stable foundation and one not subject to erosion. The slab should be level and
anchored (if necessary) prior to placing the equipment on the slab.
Cantilever Mount — The cantilever mount should be designed with adequate
safety factor to support the weight of the equipment, and for loads subjected
to the mount during operation. Installed equipment should be adequately
secured to the cantilever mount and levelled prior to operation of the
equipment.
Roof Mount — The method of mounting should be designed so as not to
overload roof structures nor transmit noise to the interior of the structure.
Refrigerant and electrical line should be routed through suitably waterproofed
openings to prevent water leaking into the structure.
INSTALLING THE INDOOR UNIT
The indoor section should be installed before proceeding with routing of
refrigerant piping. Consult the Installation Instructions of the indoor unit
(i.e.: air handler, furnace, etc.) for details regarding installation.
CONNECTING REFRIGERANT TUBING BETWEEN THE INDOOR AND OUTDOOR UNIT
CAUTION:
This system utilizes R-410A refrigerant with POE oil. When servicing, cover
or seal openings to minimize the exposure of the refrigerant system to air to
prevent accumulation of moisture and other contaminants.
General — Once outdoor and indoor unit placement has been determined,
route refrigerant tubing between the equipment in accordance with sound
installation practices. Refrigerant tubing should be routed in a manner that
minimizes the length of tubing and the number of bends in the tubing.
Refrigerant tubing should be supported in a manner that the tubing will not
vibrate or abrade during system operation. Tubing should be kept clean of
foreign debris during installation and installation of a liquid line filter
drier is recommended if cleanliness or adequacy of system evacuation is
unknown or compromised. Every effort should be made by the installer to ensure
that the field installed, refrigerant containing components of the system have
been installed in accordance with these instructions and sound installation
practices so as to insure reliable system operation and longevity.
The maximum recommended interconnecting refrigerant line length is 75 feet,
and the vertical elevation difference between the indoor and outdoor sections
should not exceed 20 feet. Consult long line application guide for
installations in excess of these limits.
Filter Dryer Installation — A filter dryer is provided with the unit and
must be installed in the liquid line of the system. If the installation
replaces a system with a filter dryer already present in the liquid line, the
filter dryer must be replaced with the one supplied with the unit. The filter
dryer must be installed in strict accordance with the manufacturer’s
installation instructions.
Optional Equipment — Optional equipment (e.g.: liquid line solenoid
valves, etc.) should be installed in strict accordance with the manufacturer’s
installation instructions.
ELECTRICAL CONNECTIONS
WARNING:
Turn off all electrical power at the main circuit box before wiring electrical
power to the outdoor unit. Failure to comply may cause severe personnel injury
or death.
Wiring Diagram/Schematic — A wiring diagram/schematic is located on the
inside cover of the electrical box of the outdoor unit. The installer should
become familiar with the wiring diagram/schematic before making any electrical
connections to the outdoor unit.
Outdoor Unit Connections — The outdoor unit requires both power and
control circuit electrical connections. Refer to the unit wiring
diagram/schematic for identification and location of outdoor unit field wiring
interfaces. Control Circuit Wiring — The outdoor unit is designed to
operate from a 24 VAC Class II control circuit. Control circuit wiring must
comply with the current provisions of the “National Electrical Code”
(ANSI/NFPA 70) and with applicable local codes having jurisdiction. Thermostat
connections should be made in accordance with the instructions supplied with
the thermostat, and with the instructions supplied with the indoor equipment.
A typical residential installation with a heat pump thermostat and air handler
are shown below.
Electrical Power Wiring — Electrical power wiring must comply with the
current provisions of the “National Electrical Code” (ANSI/NFPA 70) and with
applicable local codes having jurisdiction. Use of rain tight conduit is
recommended. Electrical conductors shall have minimum circuit ampacity in
compliance with the outdoor unit rating label. The facility shall employ
electrical circuit protection at a current rating no greater than that
indicated on the outdoor unit rating label. Refer to the unit wiring diagram
for connection details.
Minimum Circuit Ampacity — Electrical wiring to the equipment must be
compatible and in compliance with the minimum circuit ampacity listed on the
outdoor unit data label.
COPPER WIRE SIZE (1% Voltage Drop) AWG
Supply Wire Length-Feet| Supply Circuit Ampacity
200| 150| 100| 50
6| 8| 10| 14| 15
4| 6| 8| 12| 20
4| 6| 8| 10| 25
4| 4| 6| 10| 30
3| 4| 6| 8| 35
3| 4| 6| 8| 40
2| 3| 4| 6| 45
2| 3| 4| 6| 50
Wire Size based on N.E.C. for 60° type copper conductors.
Maximum Fuse/Circuit Breaker Size — Circuit protection for the outdoor
unit must be compatible with the maximum fuse/circuit breaker size listed on
the outdoor unit data label.
Disconnect Switch — An electrically compatible disconnect switch must be
within line of sight of the outdoor unit. This switch shall be capable of
electrically de-energizing the outdoor unit.
Optional Equipment — Optional equipment requiring connection to the power
or control circuits must be wired in strict accordance with current provisions
of the “National Electrical Code” (ANSI/NFPA 70), with applicable local codes
having jurisdiction, and the installation instructions provided with the
equipment. Optional Equipment (e.g.: liquid line solenoid valves, hard start
kits, low suction pressure cutout switch kit, high pressure cutout switch kit,
refrigerant compressor crankcase heater, etc.) should be installed in strict
accordance with the manufacturer’s installation instructions.
STARTUP AND CHECKOUT
WARNING:
Ensure electrical power to the unit is off prior to performing the
following steps. Failure to do so may cause personal injury or death.
Air Filters — Ensure air filters are clean and in place prior to operating
the equipment.
Thermostat — Set the room thermostat function switch to OFF, fan switch
to AUTO, and adjust the temperature setpoint to its highest setting. Prior to
applying electrical power to the outdoor unit, ensure that the unit has been
properly and securely grounded, and that power supply connections have been
made at both the facility power interface and outdoor unit.
Outdoor Unit — Ensure the outdoor coil and top of the unit are free from
obstructions and debris, and all equipment access/control panels are in place.
Using extreme caution, apply power to the unit and inspect the wiring for
evidence of open, shorted, and/or improperly wired circuits.
A typical installation with a heat pump thermostat, air handler, and heat pump with an outdoor thermostat.Typical Heat Pump with
Outdoor Thermostat and Air Handler
Functional Checkout:
CAUTION: If equipped with a compressor crankcase heater, wait 24 hours
prior to performing a function checkout to allow for heating of the compressor
crankcase. Failure to comply may result in damage and could cause premature
failure of the system.
Indoor Blower — Set the thermostat function switch to COOLING and the fan
switch to ON. Verify that the indoor blower is operating and that airflow is
not restricted. Set the fan switch back to AUTO.
Blower Time Delay Relay (Select Models): A time delay relay may be
provided with the unit and must be installed in the indoor section. The relay
will keep the indoor blower running an additional 40 seconds for increased
cooling efficiency after the outdoor unit shuts off. The relay has four
terminals and one mounting hole. Connect terminal “1” to load side of blower
relay. Connect terminal: “2” to terminal “R” of T’stat. Connect terminal “3”
to common terminal at blower relay or transformer. Connect terminal “4” to
terminal “G” on T’stat.
Low-Pressure Switch (Select Models) — A low-pressure switch is factory-
installed in select models only. If provided, this switch is located in the
suction line internal to the outdoor unit. The switch is designed to protect
the compressor from a loss of charge. Under normal conditions, the switch is
closed. If the suction pressure falls below 5 psig, then the switch will open
and de- energize the outdoor unit. The switch will close again once the
suction pressure increases above 20 psig. Please note that the switch
interrupts the thermostat inputs to the unit. Thus, when the switch opens and
then closes, there will be a 5 minute short cycling delay before the outdoor
unit will energize.
High-Pressure Switch — A high-pressure switch is factory-installed and
located in the compressor discharge line internal to the outdoor unit. The
switch is designed to de-energize the system when very high pressures occur
during abnormal conditions. Under normal conditions, the switch is closed. If
the discharge pressure rises above 575 psig, then the switch will open and de-
energize the outdoor unit. The switch will close again once the discharge
pressure decreases to 460 psig. Please note that the switch interrupts the
thermostat inputs to the unit. Thus, when the switch opens and then closes,
there will be a 5 minute short cycling delay before the outdoor unit will
energize.
Short Cycle Protection — With the system operating in COOLING mode, note
the setpoint temperature setting of the thermostat, and gradually raise the
setpoint temperature until the outdoor unit and indoor blower de-energize.
Immediately lower the setpoint temperature of the thermostat to its original
setting and verify that the indoor blower is energized and that the outdoor
unit remains de-energized. Verify that, after approximately 5 minutes, the
outdoor unit energizes and that the temperature of the air supplied to the
facility is cooler than ambient temperature.
Comfort Alert TM Diagnostics (Select Models) — The Comfort Alert TM
diagnostics module facilitates troubleshooting heat pump and air conditioning
system failures. This Comfort Alert TM module is designed only for single-
phase systems with scroll compressors that have internal overload protection.
By monitoring and analyzing data from the compressor and the thermostat
demand, the module can detect the cause of electrical and system related
failures without any sensors. A flashing LED indicator communicates the ALERT
code and guides the service technician more quickly and accurately to the root
cause of a problem.
NOTE: This module does not provide safety protection! The Comfort Alert
TM module is a monitoring device and cannot control or shut down other
devices.
LED Description (See Figure 2) POWER LED (Green): indicates voltage is
present at the power connection of the module.
ALERT LED (Yellow): communicates an abnormal system condition through a unique
fl ash code. The ALERT LED will fl ash a number of times consecutively, pause
and then repeat the process. The number of consecutive fl ashes, defi ned as the
Flash Code, correlates to a particular abnormal condition. Detailed
descriptions of specific ALERT Flash Codes are shown in Table 1 of this manual.
TRIP LED (Red): indicates there is a demand signal from the thermostat
but no current to the compressor is detected by the module. The TRIP LED
typically indicates the compressor protector is open or may indicate missing
supply power to the compressor.
The scroll compressor’s run (R), common (C) and start (S) wires are routed
through the holes in the Comfort Alert TM module marked “R,” “C” and “S.” 24
VAC Power Wiring — The Comfort Alert TM module requires a constant nominal 24
VAC power supply. The wiring to the module’s R and C terminals must be
directly from the indoor unit or thermostat. The Comfort Alert TM module
requires a thermostat demand signal to operate properly.
NOTE: After the thermostat demand signal is connected, verify that 24 VAC
across Y and C when demand is present.
TROUBLESHOOTING
Interpreting The Diagnostic LEDs – When an abnormal system condition
occurs, the Comfort Alert TM module displays the appropriate ALERT and/or TRIP
LED will fl ash a number of times consecutively, pause and then repeat the
process. To identify a Flash Code number, count the number of consecutive
flashes.
Every time the module powers up, the last ALERT Flash Code that occurred prior
to shut down is displayed for one minute. The module will continue to display
the LED until the condition returns to normal or if 24 VAC power is removed
from the module.
Cooling — Gradually lower the thermostat temperature setpoint below the
actual room temperature and observe that the outdoor unit and indoor blower
energize. Feel the air being circulated by the indoor blower and verify that
it is cooler than ambient temperature. Listen for any unusual noises. If
present, locate and determine the source of the noise and correct as
necessary.
Heating — Lower the thermostat setpoint temperature to the lowest
obtainable setting and set the thermostat function switch to HEATING. The
indoor blower and outdoor unit should stop running. After a minimum of fi ve
minutes, increase the setpoint temperature of the thermostat to the maximum
setting. Verify that the outdoor unit and indoor blower have energized. Feel
the air being circulated by the indoor blower and verify that it is warmer
than ambient temperature. Listen for any unusual noises. If present, locate
and determine the source of the noise and correct as necessary.
Status LED| Status LED Description| Status LED Troubleshooting
Information
---|---|---
Green “POWER”| Module has power| Supply voltage is present at module
terminals
Red “TRIP”| Thermostat demand signal Y is present, but the
compressor is not running| 1. Compressor protector is open
2. Outdoor unit power disconnect is open
3. Compressor circuit breaker or fuse(s) is open
4. Broken wire or connector is not making contact
5. Low pressure switch open if present in system
6. Compressor contactor has failed open
Yellow “ALERT” Flash Code 1| Long Run Time Compressor is
running extremely long run cycles| 1. Low refrigerant charge
2. Evaporator blower is not running
3. Evaporator coil is frozen
4. Faulty metering device
5. Condenser coil is dirty
6. Liquid line restriction (filter drier blocked if present in system)
7. Thermostat is malfunctioning
8. Comfort Alert Failure
Yellow “ALERT” Flash Code 2| System Pressure Trip
Discharge or suction pressure out of limits or compressor overloaded| 1.High
head pressure
2. Condenser coil poor air circulation (dirty, blocked, damaged)
3. Condenser fan is not running
4. Return air duct has substantial leakage
5. If low pressure switch present in system, check Flash Code 1 information
Yellow “ALERT” Flash Code 3| Short Cycling
Compressor is running only briefly| 1. Thermostat demand signal is
intermittent
2. Time delay relay or control board defective
3. If high pressure switch present go to Flash Code 2 information
4. If low pressure switch present go to Flash Code 1 information
Yellow “ALERT” Flash Code 4| Locked Rotor| 1. Run
capacitor has failed
2. Low line voltage (contact utility if voltage at disconnect is low)
• Check wiring connections
3. Excessive liquid refrigerant in compressor
4. Compressor bearings are seized
• Measure compressor oil level
Yellow “ALERT” Flash Code 5| Open Circuit| 1. Outdoor
unit power disconnect is open
2. Compressor circuit breaker or fuse(s) is open
3. Compressor contactor has failed open
• Check compressor contactor wiring and connectors
• Check for compressor contactor failure (burned, pitted or open)
• Check wiring and connectors between supply and compressor
• Check for low pilot voltage at compressor contactor coil
4. High pressure switch is open and requires manual reset
5. Open circuit in compressor supply wiring or connections
6. Unusually long compressor protector reset time due to extreme ambient
temperature
7. Compressor windings are damaged
• Check compressor motor winding resistance
Yellow “ALERT” Flash Code 6| Open Start Circuit
Current only in run circuit| 1. Run capacitor has failed
2. Open circuit in compressor start wiring or connections
• Check wiring and connectors between supply and the compressor “S” terminal
3. Compressor start winding is damaged
• Check compressor motor winding resistance
Yellow “ALERT” Flash Code 7| Open Run Circuit
Current only in start circuit| 1. Open circuit in compressor run wiring or
connections
• Check wiring and connectors between supply and the compressor “R” terminal
2. Compressor run winding is damaged
• Check compressor motor winding resistance
Yellow “ALERT” Flash Code 8| Welded Contactor
Compressor always runs| 1. Compressor contactor has failed closed
2. Thermostat demand signal not connected to module
Yellow “ALERT” Flash Code 9| Low Voltage
Control circuit < 17VAC| 1. Control circuit transformer is overloaded
2. Low line voltage (contact utility if voltage at disconnect is low)
• Check wiring connections
- Flash Code number corresponds to a number of LED flashes, followed by a pause and then repeated.
- TRIP and ALERT LEDs flashing at same time means control circuit voltage is too low for operation.
Table 1. Interpreting the Diagnostic LEDS
| Miswired Module Indication | Recommended Troubleshooting Action |
|---|---|
| Green LED is not on, module does not power up | Determine if both R and C |
module terminals are connected. Verify voltage is present at module’s R and C
terminals. Review 24VAC Power Wiring (page 4) for R and C wiring.
Green LED intermittent, module powers up only when compressor runs| Determine
if R and Y terminals are wired in reverse.
Verify module’s R and C terminals have a constant source. Review 24VAC Power
Wiring (page 4) for R and C wiring.
TRIP LED is on but system and compressor check OK| Verify Y terminal is
connected to 24VAC at contactor coil. Verify voltage at contactor coil falls
below 0.5VAC when off. Verify 24 VAC is present across Y and C when thermostat
demand signal is present. If not, R and C are reverse wired.
TRIP LED and ALERT LED flashing together| Verify R and C terminals are
supplied with 19-28VAC.
ALERT Flash Code 3 (Compressor Short Cycling) displayed incorrectly| Verify Y
terminal is connected to 24VAC at contactor coil. Verify voltage at contactor
coil falls below 0.5VAC when off.
ALERT Flash Code 5, 6 or 7 (Open Circuit, Open Start Circuit or Open Run
Circuit) displayed incorrectly| Check that compressor run and start wires are
through module’s current sensing holes. Verify Y terminal is connected to
24VAC at contactor coil. Verify voltage at contactor coil falls below 0.5VAC
when off.
ALERT Flash Code 6 (Open Start Circuit) displayed for Code 7 (Open Run
Circuit) or vice versa| Check that compressor run and start wires are routed
through the correct module sensing holes.
ALERT Flash Code 8 (Welded Contactor) displayed incorrectly| Determine if
module’s Y terminal is connected. Verify Y terminal is connected to 24VAC at
contactor coil. Verify 24VAC is present across Y and C when thermostat demand
signal is present. If not, R and C are reverse wired. Verify voltage at
contactor coil falls below 0.5VAC when off.
Review Thermostat Demand Wiring (page 4) for Y and C wiring.
Table 2. Module Wiring Troubleshooting
OUTDOOR THERMOSTAT (if supplied)
The outdoor thermostat prevents the electrical auxiliary heat (if used) from
operating above a desired set point. Selection of the set point is determined
from the building design heat load.
The thermostat is adjustable from 45°F to 0°F. The factory temperature setting
is at 40°F.
Defrost Cycle Timer — The defrost cycle timer controls the time interval
of the hot gas defrost after the defrost sensor closes. It is located in the
lower left corner of the defrost control board. Three interval settings are
available: 30 minutes, 60 minutes, and 90 minutes. Time setting selection is
dependent on the climate where the unit is being installed.
Example 1. Dry climate of Southern Arizona. A 90 minute setting is
recommended.
Example 2. Moist climate of Seattle, Washington. A 30 minute setting is
recommended.
To set the cycle timer, place the timing pin on the defrost control board to
the desired time interval post.
Note: All units are shipped from the factory with the default time
setting of 30 minutes. Maximum heating performance can be achieved by setting
the time to 90 minutes.
Defrost Test Procedure
- Terminals “R”-”C” must have 18-30v present between them in order for time delay and defrost sequences to be initiated.
- With compressor running in heat mode, fi rst jump the “T2”-”DFT” test pins. This will indicate to board that defrost T-stat is closed. Defrost T-stat closes at 32°, opens at 68°.
- Next jump the “Test” pin to “C” on terminal strip. This will initiate defrost test in 5, 10 or 15 seconds (This is determined by 30, 60 or 90 minutes defrost pin settings). Factory setting will be 30 minutes.
- When the reversing valve shifts to the defrost mode, quickly remove jumper from “Test”-”C”. If the jumper is not removed within a 5 second period, the defrost test will terminate. Unit will continue to stay in defrost mode Until :
A) Board recognizes that defrost sensor has reached 68° and opened or
B) “T2”-”DFT” jumper is removed or
C) 10 minutes have elapsed (board override)
If the above steps will not initiate a defrost, replace the defrost board.
Anti Short Cycle Timer Test
The 5 minute time delay feature can be bypassed or shortened to 1 second by
jumping the “Test” to “C” terminal.
Note: If jumper is left on the “Test” to “common” pins permanently, the
defrost cycle will become inoperable.
Optional Equipment — A functional checkout should be performed in
accordance with the checkout procedures supplied with the equipment.
Adjustment of Refrigerant Charge:
CAUTION:
Split system heat pump equipment contains liquid and gaseous refrigerant
under pressure. Adjustment of refrigerant charge should only be attempted by
qualified, trained personnel thoroughly familiar with the equipment. Under no
circumstances should the homeowner attempt to install and/or service this
equipment. Failure to comply with this warning could result in equipment
damage, personal injury, or death.
NOTE: The following Refrigerant Charging Charts are applicable to listed
assemblies of equipment and at listed airflows for the indoor coil. Assemblies
of indoor coils and outdoor units not listed are not recommended.
13 SEER SPLIT SYSTEM HEAT PUMP ORIFICE USAGE
Model Number|
Restrictor Bore Size (in.)
| System Charge R-410A (oz.)
---|---|---
Indoor| Outdoor
1-1/2 Ton| .050| .042| 112
2 Ton| .055| .045| 138
2-1/2 Ton| .065| .048| 145
3 Ton| .073| .052| 168
3-1/2 Ton| .077| .055| 243
4 Ton| .080| .058| 248
5 Ton| .089| .062| 248
Refrigerant Charging Charts for Cooling Mode of Operation 13 SEER Split System Cooling Charts
REFRIGERANT CHARGING CHARTS LEGEND FOR COOLING/HEATING MODES OF OPERATION
*Note: All pressures are listed in psig. and all temperatures in deg. F.
– Shaded boxes indicate flooded conditions
– Rated design values. Suction Pressure will be lower than design value if
indoor air fl ow, entering dry bulb, or entering wet bulb temperatures are
lower than design.
– Discharge temperatures greater than charted values indicates a refrigerant
undercharge.
Refrigerant Charging Charts for Cooling Mode of Operation
13 SEER Split System Cooling Charts
Refrigerant Charging Charts for Cooling Mode of Operation 13 SEER Split
System Cooling Charts
Refrigerant Charging Charts for Cooling Mode of Operation
13 SEER Split System Cooling Charts
Refrigerant Charging Charts for Heating Mode of Operation 13 SEER Split
System Heating Charts
Refrigerant Charging Charts for Heating Mode of Operation 13 SEER Split
System Heating Charts
Refrigerant Charging Charts for Heating Mode of Operation 13 SEER Split
System Heating Charts
Refrigerant Charging Charts for Heating Mode of Operation 13 SEER Split
System Heating Charts
INSTALLER: PLEASE LEAVE
THESE INSTALLATION
INSTRUCTIONS WITH THE
HOMEOWNER.
708410A (Replaces 7084100)
Specifications and illustrations subject to change
without notice and without incurring obligations.
Printed in U.S.A. (01/07)