Maytag Amana SXV9 Series Service And Troubleshooting page 66

TROUBLESHOOTING
Control Board
Fault Code
LED Display
22 E22
23 E23
24 E24
E25
25
E26
26
27 E27
28 E28
29 E29
30 E30
31 E31
2
E32
32*
2 -
33*
34 E34
66
Transmitted Climate
Thermostat Fault
Talk Message
This error indicates the equipment
is experiencing frequent high
HI DISCH TEMP discharge temperature faults.
Discharge thermistor is not put on
correct position.
The control has detected that the
Discharge Temperature Sensor is
DISCH TEMP FAIL
out of range.
HPS OPEN The high pressure switch is open.
The outdoor air temperature
AIR SENSOR FLT
sensor is open or shorted.
The control determines that the
PRESSURE SENSOR pressure sensor is not reacting
properly.
The control detects that the
COIL TEMP FAIL1 Outdoor Defrost Sensor is out of
range.
The control has detected that the
COIL TEMP FAIL2 Outdoor Coil Temperature Sensor
is out of range.
The control has detected that the
LIQ TEMP FAIL Liquid Temperature Sensor is out
of range.
Indicates the control board may
OD CTRL FAIL3
need to be replaced.
The control has detected high
HI LEAK CURRENT
leakage current (high voltege).
This error indicates the equipment
is experiencing high temperature
HI TEMP CTRL1
faults on the outdoor control board.
This error indicates the equipment
is experiencing high temperature
faults on the outdoor control board.
HI TEMP CTRL2 Control has determined continued
operation is acceptable. This
indicates they may be a problem
with the equipment.
Board detected a high current
CURRENT SPIKE condition. This indicates the
potential for a short circuit.
OUTDOOR UNIT ERROR CODES
Probable Causes
● Discharge thermistor inoperable or ● Check discharge thermistor resistance and
improperly connected connections; Repair/replace as needed
● Discharge thermistor is put on ● Check discharge thermistor position
incorrect position or off ● Check refrigerant charge level; Adjust if
● Low refrigerant charge needed
● Overcharge ● Check the compressor; Repair/replace if
● Faulty compressor needed
● Discharge thermistor inoperable or ● Check discharge thermistor resistance and
improperly connected connections; Repair/replace as needed
● High pressure switch (HPS) ● Check resistance on HPS to verify operation;
inoperable Replace if needed
● Faulty outdoor thermistor sensor or ● Inspect and test sensor; Replace sensor if
disconnect needed
● Low pressure sensor inoperable or ● Check the connection to low pressure
not properly connected sensor; Repair/replace if needed
● Outdoor defrost thermistor inoperable ● Check the connection to OD defrost
or not properly connected thermistor; Repair as needed
● Outdoor coil thermistor inoperable or ● Check the connection to OD coil thermistor;
not properly connected Repair/replace if needed
● Liquid thermistor inoperable or not ● Check the connection to liquid thermistor;
properly connected Repair/replace if needed
● Wiring to control board disconnected ● Check wiring to control board; Repair as
● Faulty control board needed
● Noise ● Replace control board if necessary
●Check ground screws/lugs and wiring;
● Improper ground Repair/replace if needed
● Faulty compressor ● Check the compressor; Repair/replace if
needed
● Cycle power; re-try during usable ambient
temperature range
● Ambient air conditions too high
● Verify cooling bracket screws in place and
● Cooling bracket screw(s) missing or
secure; Secure fasteners as needed (2-4 ton
not properly fastened (2-4 ton only)
only)
● No or poor thermal grease coating
● Check thermal grease inside cooling bracket
between cooling plumbing and cooling
on control board; Apply additional grease as
bracket on control board (2-4 ton only)
needed
● Outdoor fan low speed (5 ton only)
● Check outdoor fan motor & wiring;
● No flow or limited flow through control
Repair/replace if needed (5 ton only)
board cooling circuit (potential
● Check for restriction in line
restriction in line or low refrigerant) (2-4
● Check refrigerant charge level; Adjust if
ton only)
needed (2-4 ton only)
● Stop valve not completely open (2-4
● Check the opening of stop valve, should be
ton only)
full open;
Repair/replace if needed (2-4 ton only)
● Cycle power; re-try during usable ambient
temperature range
● Ambient air conditions too high
● Verify cooling bracket screws are in place
● Cooling bracket screw(s) missing or
and secure; Secure fasteners as needed (2-4
not properly fastened (2-4 ton only)
ton only)
● No or poor thermal grease coating
● Check thermal grease inside cooling bracket
between cooling plumbing and cooling
on control board; Apply additional grease as
bracket on control board (2-4 ton only)
needed
● Outdoor fan low speed (5 ton only)
● Check outdoor fan motor & wiring;
● No flow or limited flow through control
Repair/replace if needed (5 ton only)
board cooling circuit (potential
● Check for restriction in line
restriction in line or low refrigerant) (2-4
● Check refrigerant charge level; Adjust if
ton only)
needed (2-4 ton only)
● Stop valve not completely open (2-4
● Check the opening of stop valve - it should
ton only)
be fully
open; Repair/replace if needed (2-4 ton only)
● Check power supply for in-rush current
during start-up or steady state operation
● Current spike in supply ● Check the opening of stop valve, should be
● Stop valve not completely open full open; Repair/replace if needed
● The compressor wire is lost phase ● Check the wire between control board and
● Faulty control board compressor
● Faulty compressor ● Replace control board if necessary
● Check the compressor; Repair/replace if
needed
Corrective Actions