-
113
-
Is the power
supply voltage
proper?
•
Is the installation space for the indoor and outdoor
units proper?
•
Is there a short circuit in the indoor or outdoor
units?
•
During cooling: Is FMo operating?
Is the service valve fully open?
•
During heating: Is FMI operating?
Is the service valve fully open?
Is the filter clogged?
•
Is liquid flowing back to the compressor?
Is the overheating control normal?
Are the low pressure sensor and suction pipe
temperature thermistor normal?
•
Is the compressor making abnormal noises?
NO
YES
YES
YES
YES
Check the power supply.
Is the service
valve fully open?
NO
Open it fully.
Is the high
pressure during operation
proper?
Does it return to
normal if the power
supply is reset
(2 of 3 times)?
NO
Check the refrigerant level
and refrigerant circuit.
Check the
compressor's insulation
resistance and winding
resistance.
NO
NO
YES
YES
Replace the compressor.
Check the
power transistor module
(See page 118)
OK
NG
Replace the outdoor
unit inverter PCB.
Replace the outdoor
unit inverter PCB.
It may be malfunction due to transient noise. If
there is a noise source nearby, take measures to
eliminate it.
(1)
(1)
9
[Current cut]
Indoor unit
Red LED
Green LED
Stays OFF
Keeps flashing
Red LED
Green LED
1 time flash
Keeps flashing
Outdoor unit
Error display :
e42
●
Display conditions
If the inverter’s output current ex-
ceeds the set value, the compres-
sor stops. After a 3-minute delay, it
restarts, but if this occurs 4 times
within 30 minutes.
10
Error display
:
e45
[Inverter communications are abnormal]
Indoor unit
Red LED
Green LED
Stays OFF
Keeps flashing
Red LED
Green LED
1 time flash
Keeps flashing
Outdoor unit
YES
NO
YES
NO
Correction
Correction
Replace the outdoor
unit control PCB.
Are the connector connections
between the outdoor unit control PCB
and the inverter PCB good?
Are JSW10, 11 on the
inverter PCB all OFF?
NO
Replace the outdoor
unit inverter PCB.
Did it return to normal?