Rheem RHMV2421MNACJA Service Manual page 91

Troubleshooting 30
Compressor temperature error
Detective actuators:
Compressor temperature thermistor
Detective details:
"Protection stop
by compressor temperature ≥ 230°F (110°C)
(36/48 models 226.4
during compressor operation"
generated 2 times within 24 hours
Forecast of cause:
1. 3-way valve not opened
2. EEV defective, strainer clogged
3. Outdoor unit operation failure, foreign matter on condenser coil
4. Compressor temperature thermistor failure
5. Insufficient refrigerant
Cooling operation
Check Point 1 : Check if 3-way valve (gas side) is open.
If the 3-way valve(gas side) was closed, open the
3-way valve(gas side) and check operation.
OK
Check Point 2 : Check the EEV, strainer
EEV open?
Strainer clogging check
(before and after EEV, ACM, oil return)
OK
Check Point 3 : Outdoor unit fan, condenser coil check
Check for foreign object at condenser coil
Check if fan can be rotated by hand.
Motor check
OK
Check Point 4 : Check the compressor temperature thermistor
Compressor temperature thermistor characteristics check.
(Check by disconnecting thermistor from PCB)
(Parts infomation 7)
OK
Check Point 5 : Check the refrigerant amount
Leak check
°F (115°C))
Indicate or Display:
Indoor unit
Operation lamp: 10 times Flash,
Timer lamp
Wired remote control
Error code : [E : A3]
Outdoor unit (RP1736/1748HJVXA)
Mode Error
2
: Light OFF
Heating operation
Check Point 1 : Check if 3-way valve(liquid side) is open.
If the 3-way valve(liquid side) was closed, open the
3-way valve(liquid side) and check operation.
OK
Check Point 2 : Check the EEV, strainer
EEV open?
Strainer clogging check
(before and after EEV, ACM, oil return)
OK
03-41
: 3 times Flash
A B C D E
10
3
: Light ON n : n times blinking
F