Rheem RHMV2421MNACJA Service Manual page 73

Troubleshooting 16
Active filter voltage error
Detective actuators:
Outdoor unit main PCB
Active filter module
Detective details:
When inverter input DC voltage
is higher than 430V or lower than 110V.
When momentary power cut off
occurred on low voltage
Forecast of cause:
1. External cause
2. Connector connection failure
3. Main PCB failure
4. Active filter module failure
Check Point 1 : Check external cause at indoor and outdoor (voltage drop or noise)
Instant drop : Check if there is a large load electric apparatus in the same circuit.
Momentary power failure : Check if there is a defective contact or leak current
Noise : Check if there is any equipment causing harmonic wave near electric line.
(Neon bulb or electric equipment that may cause harmonic wave)
Check the complete insulation of grounding.
OK OK
Check Point 2 : Check connection of connector
Check if connector is removed.
Check erroneous connection.
Check if cable is open.
>>Upon correcting the removed connector or mis-wiring, reset the power.
OK OK
Check Point 3 : Check active filter module
Check Active filter module. (Parts information 5)
>>If Active filter module is abnormal, replace it.
OK OK
Check Point 4 : Replace main PCB
If Check Point 1 - 3 do not improve the symptom, change Main PCB.
in the power supply circuit.
Indicate or Display:
Indoor unit
Operation lamp: 6 times Flash,
Timer lamp
Wired remote control
Error code : [E : 64]
Outdoor unit : No indication
03-23
: 4 times Flash