Mitsubishi Heavy Industries FDTCVA151HEN1R Technical Manual page 274

Error display :
3
Indoor unit
Red LED Stays OFF
Green LED Keeps flashing
Measure the power supply voltage.
Is the voltage between the phases
AC 220/240 V or 380/415 V?
YES
Is the power supply
fuse blown?
NO
Noise filter
Is the voltage between the secondary side
phases AC 220/240 V or 380/415 V?
YES
Is the fuse on the control
PCB 5A blown?
NO
Are the connections between
the noise filter and the outdoor
unit control PCB good?
YES
The outdoor unit control
PCB is faulty. Replace it.
• Display conditions
After the power goes ON, if the power supply is 0 V at either L1, N phase (1 phase model),
L1, L2, L3 phase (3 phase model).
E34
[Power supply open phase] [Only case of 302~1002 models]
Red LED
Green LED
NO
Check the power supply.
(1)
YES
Check the inverter.
Note (1) Models 302~602.
NO
Replace the noise filter
YES
Replace the fuse
NO
Connect them correctly.
Outdoor unit
1 time flash
Keeps flashing
*
Replace the fuse
271
- -
*
Inverter check before replacing the power fuse.
Is there a short between
phases in the noise filter?
NO
Is the power transistor module or
diode stack cracked or damaged?
NO
Is the reactor anomalous?
NO
Replace the
power fuse.
YES
Replace the
noise filter
YES
Replace the power
transistor module or
diode stack.
YES
Replace the
reactor.