Maytag Amana AVZC18 Service And Troubleshooting page 48

TROUBLESHOOTING
ClimateTalk PCB LED Transmitted ClimateTalk
Fault Code Display Message
35 E35 HIGH CURRENT
36 E36 STARTUP ERROR
37 E37 OD CTRL FAIL4
38 E38 COMP VOLTAGE
39 E39 OD CTRL FAIL5
40 E40 COMP MISMATCH
41 E41 LOW REFRIGERANT
42 E42 LOW LINE VOLT
43 E43 HIGH LINE VOLT
44 E44 OP TEMP RANGE
45 E45 NO COOLING TEST
47 E47 NO SYS VER TEST
48 E48 NO PUMP DOWN
49 E49 NO CHARGE MODE
50 E50 LINE VOLT CTRL
51 E51 OD COMM ERROR
52 - COMP FAIL MINOR
48
Thermostat Fault
● Short circuit condition
● Stop valve not completely open
Board detected a high current condition. ● Overcharge
● Faulty control board
● Faulty compressor
● Blocked/restricted condenser coil and/or
lines
The control encountered an abnormal
● The compressor wire is lost phase
condition during the startup procedure.
● Inconsistent compressor load
● Faulty control board
Indicates the control board may need to
● Faulty control board
be replaced.
● High or low voltage from supply
The control has detected a voltage
● The compressor wire is lost phase
related issue with the compressor.
● Faulty control board
● Thermistors inoperable or improperly
Indicates the control board may need to
connected
be replaced.
● Faulty control board
● Bluetooth Shared Data Loader BTSDL01
Control determines that its compressor
not correct
requirement is different than the
● Control board mismatch
compressor capability.
● Refrigerant leak
The control has detected a low ● Low refrigerant charge
refrigerant condition. ● Thermistors inoperable or not properly
connected
Control detects a low power supply
● Low line voltage supply
voltage condition.
Control detects a high power supply
● High line voltage supply
voltage condition.
The control detects the outdoor
temperature outside recommended
● Ambient air conditions too high or low
operational range. Unit may continue to
operate normally.
The control is unable to start the Cooling
mode test because indoor heat has been
● Heat provided by secondary heating source
turned on by thermostat. Please set
thermostat to off position.
The control is unable to start the System
Verification test because indoor heat has
● Heat provided by secondary heating source
been turned on by thermostat. Please
set thermostat to off position.
The control is unable to enter the Pump
Down Mode because indoor heat has
● Heat provided by secondary heating source
been turned on by thermostat. Please
set thermostat to off position.
The control is unable to enter Charging
Mode because indoor heat has been
● Heat provided by secondary heating source
turned on by thermostat. Please set
thermostat to off position.
This indicates there is a voltage issue on
● High or low voltage from supply
the control board. See service manual for
● Faulty control board
troubleshooting information.
This indicates potential communication
issues have been detected by the ● Communication wiring disconnected
outdoor control board.
This error indicates the equipment is
experiencing frequent compressor faults.
● Stop valve not completely open
Control has determined continued
● The compressor wire is lost phase
operation is acceptable. This indicates
● Compressor motor failure
they may be a problem with the
equipment.
OUTDOOR UNIT- ERROR CODES
Probable Causes
● Check installation clearances.
● Check the opening of stop valve, should be full open;
Repair/replace if needed
● Check refrigerant charge level; Adjust if needed
● Replace control board if necessary
● Check the compressor; Repair/replace if needed.
● Check and clean condenser coil and/or lines
● Check the wire between control board and
compressor
● Replace control board if necessary
● Replace control board if necessary
● Correct low/high line voltage condition; Contact local
utility if needed
● Check the wire between control board and
compressor
● Replace control board if necessary
● Check the connection to thermistors; Repair/replace if
needed
● Replace control board if necessary
● Check Bluetooth Shared Data Loader BTSDL01 data
vs. Heat Pump model
● Verify control board size vs. Heat Pump model;
Replace control board if necessary
● Test for system leaks using leak test procedure
● Check refrigerant charge level; Adjust if needed
● Checkthe connection to thermistor; Repair/replace if
needed
● Check circuit breakers and fuses; Replace if needed
● Verify unit is connected to power supply as specified
on rating plate
● Correct low line voltage condition; Contact local utility
if needed
● Verify unit is connected to power supply as specified
on rating plate
● Correct high line voltage condition; Contact local
utility if needed
● Cycle power; re-try during usable ambient
temperature range
● Turn off heater using thermostat before running AHRI
mode
● Turn off heater using thermostat before operation
● Turn off heater using thermostat before operation
● Turn off heater using thermostat before operation
● Correct low/high line voltage condition; Contact local
utility if needed
● Replace control board if necessary
● Check communication wiring; Repair as needed
● Check the opening of stop valve, should be full open;
Repair/replace if needed
● Check the wire between control board and
compressor
● Inspect compressor motor for proper function;
Replace if necessary
Corrective Actions