Mitsubishi Heavy Industries FDTC50ZHXV Technical Manual page 308

Error code
Remote controller: E34
1. Applicable model
3-phase models only
2. Error detection method
When 0V is detected on any
of L1, L2, L3 for 5 seconds
continuously after turning
power on
3. Condition of Error displayed
Same as above
4. Presumable cause
• Anomalous power supply
• Blow power supply fuse
• Defective noise filter
• Defective wire connection on
noise filter control PCB
• Defective outdoor control
PCB
Note:
LED Green Red
Keeps flashing Stays Off
Indoor
Keeps flashing 1 time flash
Outdoor
5. Troubleshooting
Diagnosis
Isn't there
any short-circuit between phases
of noise filter?
NO
Is there
any crack or burning on the
power transistor module or
diode stack?
NO
Is the reactor OK?
YES
Replace the power supply fuse.
298
–
Open L3 Phase on
Content
power supply (Continued)
(3-phase model only)
Method to check for inverter
PCB before replacement of
blown power supply fuse.
YES
Replace the noise filter.
YES
Replace the control PCB,
inverter PCB, power transistor
module or diode stack
NO
Replace the reactor.
–
Countermeasure