Rheem RHMV2421MNACJA Service Manual page 60

Troubleshooting 5
Combination error
Detective details:
1. Outdoor unit receives serial signal of applied
refrigerant information from Indoor unit
When the refrigerant is R410A.
2. When outdoor unit type is multi.
Forecast of cause:
1. Selection of indoor units is incorrect
Check Point 1 : Check the type of indoor unit
Check the type of the connected indoor unit.
>> If abnormal condition is found, correct it.
OK
Check Point 2 : Replace main PCB
If Check Point 1 do not improve the symptom,
replace main PCB of Outdoor unit.
Indicate or Display:
Indoor unit
Operation lamp: 2 times Flash,
Timer lamp
Wired remote control
Error code : [E : 23]
Outdoor unit (RP1736/1748HJVXA)
Mode Error
2
: Light OFF
03-10
: 3 times Flash
A B C D E
5 15
: Light ON n : n times blinking
F