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Haier HC48A1VAR [42/45] Troubleshooting guide
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Commercial Air Conditioner Model: heat pump, 10SEER UNITS
41
.Break each vacuum with dry nitrogen to 3.0 psi.
Use the largest connections and hoses possible to expedite the process.
J. Charge with clean ,new or reclaimed R-22 refrigerant .Charge in accordance with proper
charging procedures.
K. Check ,and change as needed ,after 24 hours of run time to verify the unit is free of acid.
7. Other Check Points
A. Verify the operating voltage is within the specified range.
B. Check that all wiring connections are tight and proper.
C. Verify that all fuses or circuit breakers are of the proper type.
D. Ensure the air conditioning operates properly in cooling.
E. Inspect all the other electrical components for proper operation.
F. Ensure the thermostat and subbase are correct and operate properly.
G. Ensure all ducts and air moving device are sized and operate properly.
H. Ensure the refrigerant piping is sized correctly and not pinched.
I. Ensure all the system are in correct position.
10.3Troubleshooting Guide
! WARNING – Disconnect all electrical power to the unit before servicing. Disconnect power to both the indoor
and outdoor units. NOTE: There may be more than one electrical disconnect switch. Failure to shut off power can
cause electrical shock resulting in personal injury or death.
Symptom Possible Cause Remedy
Power off or loose electrical
connection
Make sure main switch is ON. Check and
tighten all connections.
No cooling
Incorrect thermostat setting Set thermostat correctly
Dirty filters Clean & replace
Indoor air blockage Check supply registers and return grills for
blockage.
Blocked outdoor coil Clear away leaves and other debris
Improperly sized unit Recalculate load
Improper airflow Check – should be 400CFM/Ton
Incorrect refrigerant charge Charge correctly per instruction.
Air, non-condensable or moisture in
system
Recover refrigerant, evacuate & recharge,
add filter drier
Insufficient Cooling
Incorrect voltage At compressor terminals, voltage must be
within 10% of rating plate volts when unit is
running.
Water on floor or in
furnace
Blocked condensate drain and “P”
trap
Remove blockage
AC Contact not connect to the power
supply wire or not tightly fasten.
Re-connect the power supply wire ,and
tightly fasten.
The outdoor power supply main circuit
switch locate “OFF” position or fuse
failure of main circuit
Dial the power supply switch to “ON ”
position or change the fuse and make sure
the main touch point of AC Contactor
have current go through
Condenser fan and
compressor don’t run
The control coil of AC Contactor no 24
V AC power
Check if the relay P2 of 3-minute timer board
have current output ,if not ,check if P1、 P3
have 24 V AC input ， if have 24V AC ，
please check if it keep for 3 minutes， if so
and P2 no output ，change the 3-minute
timer board； if keep time < 3 minutes ，P2
no output ; if P1 、P3 no24V AC， first
check the thermostat C 、Y terminal have
24 V AC，if no 24 V AC，then check the
thermostat or reset the setting temp.; if have
24 V AC ,check if the C Y and P1、 P3
connection wire cut off or fasten loosely，if
cut off ，then change the parts.
Содержание
- Commercial air conditioning 2
- Features 2
- Hr18a1var hr24a1var 2
- Hr30a1var hr36a1var 2
- Hr42a1var hr48a1var 2
- Hr60a1var 2
- Service manual 2
- Application 12 3
- Commercial air conditione 3
- Contents 3
- Description of products fearures 3
- Electrical control devices 1 3
- Explosive diagram and spare parts list 4 3
- Installation instructions 4 3
- Maintenance instructions 1 3
- Model heat pump 10seer units 3
- Physical and electrical specifications 5 3
- Refrigerant diagram 3 3
- Safety precaution 9 3
- Service and troubleshooting 32 3
- System components and functions 9 3
- Wiring diagrams 3 3
- Air conditioner 4
- Commercial air conditione 4
- Description of products fearures 4
- Engineering features 4
- H c 24 a 1 v a r 4
- Nomenclature for model numbe 4
- Accessories 5
- Commercial air conditione 5
- Commercial air conditione 6
- Model heat pump 10seer units 6
- Physical and electrical specifications 6
- Commercial air conditione 7
- Model heat pump 10seer units 7
- Commercial air conditione 8
- Model heat pump 10seer units 8
- And functions 9
- Cautio 9
- Commercial air conditione 9
- Safety precautions 9
- System components 9
- Commercial air conditione 10
- Commercial air conditione 11
- Electrical control devices 11
- Refrigerant circuit 11
- Service valves 11
- Application 12
- Commercial air conditione 12
- Commercial air conditione 13
- Designates metric conversions table 6 1 13
- Model heat pump 10seer units 13
- Model hr18 60a1var 13
- The cooling load calculation determines the unit size there are two capacities that enable the equipment to provide comfort the first is sensible capacity how much sensible heat can the unit remove sensible heat is the heat energy measured on the dry bulb thermometer the second form of heat is called latent or hidden heat this is heat held in the humidity in the air removing this heat does not affect a thermometer however removing the heat held in the moisture in the air greatly increase comfort a properly sized unit removes both forms of heat producing a comfortable living space an oversized system cycles on and off too quickly and does not properly remove humidify producing an uncomfortable living space select the indoor and outdoor equipment combination based on the manufacturer s engineering data after the proper equipment combination has been selected satisfying both sensible and latent conditioning requirements the system must be properly installed only then can the unit provide 13
- Unit dimensions 13
- Commercial air conditione 14
- Installation instructions 14
- Outdoor unit indoor coil model 14
- Refrigerant system diagram refer figure below 14
- Commercial air conditione 15
- Cooling 15
- Figure 7 heat pump refrigerant circuit 15
- Heating 15
- Model heat pump 10seer units 15
- Commercial air conditione 16
- Equipment protection from environment 16
- Outdoor unit inspection 16
- This product has been inspected at the factory and released to the transportation agency without known damage inspect exterior of carton for evidence of rough handling in shipment unpack carefully if damage is found report immediately to the transportation agency 16
- Installation 17
- Refrigerant piping 18
- Unit clearances 18
- Commercial air conditione 20
- The factory charge is sufficient for 25 feet of standard liquid line for longer or shorter liquid line lengths adjust the charge as follows 1 4 line 0 oz per foot 5 16 line 0 oz per foot 3 8 line 0 oz per foot 1 2 line 1 oz per foot vertical separation between indoor and outdoor units maximum allowable vertical separations between indoor and outdoor units are illustrated in fig 8 2 a and fig 8 2 b it s 70 when the indoor unit is below the outdoor unit fig 3 a and 50 when the indoor unit is above the outdoor unit fig 8 2 b to ensure good oil return to the compressor when the indoor unit is below the outdoor unit suction line oil trap should be used as illustrated in fig 8 2 a tubing connections caution use extreme caution in removing the caps from the suction and liquid line fittings as there is pressure present a fitting is on the liquid line to remove pressure caution condensing units are charged with refrigerant condensing unit liquid and suction valves are closed to contain the char 20
- Undesirable heat transfer resulting in capacity loss and increased power consumption refrigerant line sizing check the following table table 8 1 for correct suction and liquid line sizes for any combination of the unit size and the maximum refrigerant line length 20
- Charging the system 21
- Electrical wiring 22
- Commercial air conditione 24
- Indoor unit installation 24
- 22 23 4 25 8 9 6 83 6 5 9 22 4 19 6 3 6 135 cm 56 cm 59 cm 64 cm 23cm 212cm 14 cm 57 cm 50 cm 9 5cm 25
- 22 23 4 25 8 9 6 83 6 5 9 22 4 19 6 3 6 151cm 56 cm 59 cm 64 cm 23cm 212cm 14 cm 57 cm 50 cm 9 5cm 25
- A b c d e f g h j k 25
- B for hb m25 air handler 25
- Commercial air conditione 25
- For hb3600vc1m25 25
- For hb42 6000va1m25 hb6000vc1m25 25
- Model heat pump 10seer units 25
- Horizontal left hand instructions 27
- Commercial air conditione 29
- Downflow instructions 29
- Warning the a coil contains 150 p s i g of air pressure before setting up flowrator assembly for field brazing see page 12 or read the warning label on the lower access panel refrigerant tubing refrigerant tubing should be installed as to avoid undue stress they must be supported or routed to avoid strain or vibration to avoid damage that can be caused by condensate insulate the suction tube with a closed cell insulation with the seams sealed the insulation should terminate at the tubing entrance to the air handler do not reduce the recommended tubing size condensate removal 29
- Commercial air conditione 31
- Operation 31
- System startup 31
- Table 8 4 31
- Commercial air conditione 32
- Maintenance instructions 32
- Commercial air conditione 33
- Service and troubleshooting 33
- Commercial air conditione 34
- Installation and service checklist 34
- Commercial air conditione 35
- Commercial air conditione 36
- Commercial air conditione 37
- Commercial air conditione 38
- Commercial air conditione 39
- A suction pressure holds normal condition b suction pressure rises to a point and stops some refrigerant finally evaporated in the coil and made its pressure felt on the gauge normal condition do not start the compressor to force this little refrigerant into the condenser c suction pressure rises and eventually equalizes with the high pressure abnormal condition refrigerant is leaking from the condenser coil causes leaking liquid line valve leaking discharge check valve scroll compressors only leaking compressor valves action determine the causes and correct it d suction pressure never drops to 3 5 psi abnormal condition refrigerant is leaking from the condenser coil causes leaking liquid line valve leaking discharge check valve scroll compressors only leaking compressor valves action determine the causes and correct it refrigerant noncondensibiles check this procedure checks the quality of the refrigerant by comparing the refrigerant pressure to its temperature the test tells if there 40
- Commercial air conditione 40
- Model heat pump 10seer units 40
- Table 10 1 1 pump the system down as the explained in the previous procedure open the unit disconnect to shut down the system when the suction pressure drops to 3 5 psi positive pressure 2 front seat the large vapor line valve 3 de energize the compressor remove each wire from the compressor terminals mark and identify the wire terminals warning wrap a layer of insulation electrical tape over the wire terminals not the compressor terminals this wire end is hot with voltage during the reminder of the test 4 energize the system and run the condensing fan measure the condensing coil entering and leaving air temperature with accurate thermometers 5 run the condensing fan until the leaving air temperature equals to the entering air temperature this is now the refrigerant temperature 6 compare the refrigerant pressure shown on the high pressure gauge to its associated pressure on a temperature pressure conversion chart 7 the refrigerant pressure should equal the chart pressure for the given 40
- Commercial air conditione 41
- Break each vacuum with dry nitrogen to 3 psi use the largest connections and hoses possible to expedite the process j charge with clean new or reclaimed r 22 refrigerant charge in accordance with proper charging procedures k check and change as needed after 24 hours of run time to verify the unit is free of acid 7 other check points a verify the operating voltage is within the specified range b check that all wiring connections are tight and proper c verify that all fuses or circuit breakers are of the proper type d ensure the air conditioning operates properly in cooling e inspect all the other electrical components for proper operation f ensure the thermostat and subbase are correct and operate properly g ensure all ducts and air moving device are sized and operate properly h ensure the refrigerant piping is sized correctly and not pinched i ensure all the system are in correct position 42
- Commercial air conditione 42
- Model heat pump 10seer units 42
- Troubleshooting guide 42
- Warning disconnect all electrical power to the unit before servicing disconnect power to both the indoor and outdoor units note there may be more than one electrical disconnect switch failure to shut off power can cause electrical shock resulting in personal injury or death symptom possible cause remedy 42
- Commercial air conditione 43
- Model heat pump 10seer units 43
- 1 2 2 4 4 5 5 3 3 44
- Bcr blower control relay bcap run capacitor blower motor cc compressor contactor cch crankcase heater optional chs crankcase heater switch optional cmpr compressor dfc defrost control board hps high pressure switch lps low pressure switch ibm indoor blower motor ods outdoor temperature sensor ofm outdoor fan motor rcap run capacitor compressor rvs reversing valve solenoid stcap start capacitor optional strly start relay optional strth start thermistor optional tran transformer 230 208 selectable 44
- Bk black bl blue gy gray br brown gr green or orange pu purple rd red vi violet wh white yl yellow 44
- Color codes 44
- Component codes 44
- Confirm defrost control board dfc dip switch settings and ct application for system selection as shown in adjacent table optional components may be field or factory installed 2 if lps and or hps not installed or removed a jumper wire must be present across connector cn8 of the defrost control board dfc for system to operate 3 for proper system operation consult indoor unit and outdoor unit installation instructions to confirm system match up and blower speed selection 4 alternate double pole contactor used on some systems 5 only one start assist method to be used at a time consult outdoor unit installation instructions for application information use only factory approved accessories 6 optional ofm components may connect capacitor common and motor common for reciprocating compressor there may have crankcase heater consult outdoor unit installation instructions for details select the running capacitor one or dual and connect if ifm or ofm only have one capacitor wire connect com wire to 44
- Continuous on 24vac supplied to y terminal of defrost control flash on off system in defrost operation 1 2 1 2 1 flash pipe coil sensor open or short circuit 1 2 1 2 2 flash vent suction sensor short circuit 1 2 1 2 3 flash lps hps open circuit 1 2 1 2 4 flash ct sensor out of max range 44
- Factory standard field installed 44
- Factory standard field installed optional 44
- Heat pump wiring diagram 44
- Hz 1ph 44
- Led flash codes led illuminates during unit operation only 44
- Line voltage 44
- Low voltage 44
- Outdoor unit 44
- The diagram wiring of the fan motor maybe have some difference from the real parts due to different types of fan motor the detailed information can refer to the fan motor nameplate 44
- Thermostat 44
- Unit indoor 44
- Use copper conductors only warning cabinet must be permanently grounded and all wiring to conform to i e c n e c c e c c l c and local codes as applicable replacement wire must be the same gage and insulation type as original wire 44
- Wiring diagram 44
- Haier group 45
- Haier industrial park no haier road 45
- Sincere forever 45
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