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