Amana AVXC20 Series, Service Instructions Manual

Page: 71 / 82

71
TROUBLESHOOTING
OUTDOOR UNIT ERROR CODES
41 E41 LOW REFRIGERANT
The control has detected a low refrigerant condition.
● Refrigerant leak
● Low refrigerant charge
● Test for system leaks using leak test procedure
● Check refrigerant charge level; Adjust if needed
42 E42 LOW LINE VOLT
Control detects a low power supply voltage
condition.
● Low line voltage supply
● 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
43 E43 HIGH LINE VOLT
Control detects a high power supply voltage
condition.
● High line voltage supply
● Verify unit is connected to power supply as
specified on rating plate
● Correct high line voltage condition; Contact local
utility if needed
44 E44 OP TEMP RANGE
The control detects the outdoor temperature
outside recommended operational range. Unit may
continue to operate normally.
● Ambient air conditions too high or low
● Cycle power; re-try during usable ambient
temperature range
45 E45 NO COOLING TEST
The control is unable to start the Cooling mode test
because indoor heat has been turned on by
thermostat. Please set thermostat to off position.
● Heat provided by secondary heating source
● Turn off heater using thermostat before running
AHRI mode
47 E47 NO SYS VER TEST
The control is unable to start the System
Verification test because indoor heat has been
turned on by thermostat. Please set thermostat to
off position.
● Heat provided by secondary heating source
● Turn off heater using thermostat before
operation
ClimateTalk
Fault Code
PCB LED
Display
Transmitted
ClimateTalk Message
Thermostat Fault Probable Causes Corrective Actions
30 E30 OD CTRL FAIL3
Indicates the control board may need to be
replaced.
● Wiring to control board disconnected
● Faulty control board
● Noise
● Check wiring to control board; Repair as needed
● Replace control board if necessary
31 E31 HI LEAK CURRENT
The control has detected high leakage current (high
voltage). ● Improper ground
● Faulty compressor
● Check ground screws/lugs and wiring;
Repair/replace if needed
● Check the compressor; Repair/replace if needed
32 E32 HI TEMP CTRL1
This error indicates the equipment is experiencing
high temperature faults on the outdoor control
board.
● Ambient air conditions too high
● Cooling bracket screw(s) missing or not properly
fastened (2-4 ton only)
● No or poor thermal grease coating between cooling
plumbing and cooling bracket on control board (2-4 ton
only)
● Outdoor fan low speed (5 ton only)
● No flow or limited flow through control board cooling
circuit (potential restriction in line or low refrigerant) (2-4
ton only)
● Stop valve not completely open (2-4 ton only)
● Cycle power; re-try during usable ambient
temperature range
● Verify cooling bracket screws in place and
secure; Secure fasteners as needed (2-4 ton only)
● Check thermal grease inside cooling bracket on
control board; Apply additional grease as needed
● Check outdoor fan motor & wiring;
Repair/replace if needed (5 ton only)
● Check for restriction in line
● Check refrigerant charge level; Adjust if needed
(2-4 ton only)
● Check the opening of stop valve, should be full
open; Repair/replace if needed (2-4 ton only)
33 - HI TEMP CTRL2
This error indicates the equipment is experiencing
high temperature faults on the outdoor control
board. Control has determined continued operation
is acceptable. This indicates they may be a
problem with the equipment.
● Ambient air conditions too high
● Cooling bracket screw(s) missing or not properly
fastened (2-4 ton only)
● No or poor thermal grease coating between cooling
plumbing and cooling bracket on control board (2-4 ton
only)
● Outdoor fan low speed (5 ton only)
● No flow or limited flow through control board cooling
circuit (potential restriction in line or low refrigerant) (2-4
ton only)
● Stop valve not completely open (2-4 ton only)
● Cycle power; re-try during usable ambient
temperature range
● Verify cooling bracket screws in place and
secure; Secure fasteners as needed (2-4 ton only)
● Check thermal grease inside cooling bracket on
control board; Apply additional grease as needed
● Check outdoor fan motor & wiring;
Repair/replace if needed (5 ton only)
● Check for restriction in line
● Check refrigerant charge level; Adjust if needed
(2-4 ton only)
● Check the opening of stop valve, should be full
open; Repair/replace if needed (2-4 ton only)
34 E34 CURRENT SPIKE
Board detected a high current condition. This
indicates the potential for a short circuit.
● Current spike in supply
● Stop valve not completely open
● The compressor wire is lost phase
● Faulty control board
● Faulty compressor
● Check power supply for in-rush current during
start-up or steady state operation
● Check the opening of stop valve, should be full
open; Repair/replace if needed
● Check the wire between control board and
compressor
● Replace control board if necessary
● Check the compressor; Repair/replace if needed
35 E35 HIGH CURRENT
Board detected a high current condition.
● Short circuit condition
● Stop valve not completely open
● Overcharge
● Faulty control board
● Faulty compressor
● 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.
36 E36 STARTUP ERROR
The control encountered an abnormal condition
during the startup procedure.
● Blocked/restricted condenser coil and/or lines
● The compressor wire is lost phase
● Inconsistent compressor load
● Faulty control board
● Check and clean condenser coil and/or lines
● Check the wire between control board and
compressor
● Replace control board if necessary
37 E37 OD CTRL FAIL4
Indicates the control board may need to be
replaced. ● Outdoor fan motor not connected properly
● Faulty control board
● Check wiring from Outdoor fan motor to control
board; Repair if needed
● Replace control board if necessary
38 E38 COMP VOLTAGE
The control has detected a voltage related issue
with the compressor.
● High or low voltage from supply
● The compressor wire is lost phase
● Faulty control board
● Correct low/high line voltage condition; Contact
local utility if needed
● Check the wire between control board and
compressor
● Replace control board if necessary
39 E39 OD CTRL FAIL5
Indicates the control board may need to be
replaced. ● Thermistors inoperable or improperly connected
● Faulty control board
● Check the connection to thermistors;
Repair/replace if needed
● Replace control board if necessary
40 E40 COMP MISMATCH
Control determines that its compressor requirement
is different than the compressor capability. ● Memory card not correct
● Control board mismatch
● Check memory card data vs. air conditioner
model
● Verify control board size vs. air conditioner
model; Replace control board if necessary