E42
E42
Current cut (2)
Stays Off
1. Applicable model
5. Troubleshooting
Outdoor unit
Diagnosis Countermeasure
Is the
checked result of
power transistor
module OK?
• Is the installation space of indoor and/or outdoor unit enough?
• Is there any short-circuit of air on indoor and/or outdoor unit?
• At cooling, does the outdoor fan motor run?
Is the filter clogged?
• At heating, does the indoor fan motor run?
Is the filter clogged?
• Is there any liquid flooding?
Is the superheat within normal range?
Is the low pressure sensor and suction pipe temperature normal?
• Is there any anomalous sound on the compressor?
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NO
After
resetting power
for several times does it
become normal?
NO
Temporary noise may cause
of anomaly.
If noise source can be found,
take countermeasure.
Replace inverter PCB.
Replace compressor.
2. Error detection method
In order to prevent from
over current of inverter,
if the current exceeds the
compressor stopping.
3
.
Condition of error displayed
If the output current of inverter
Makes the compressor stopping.
After 3-minutes dealY, The
Compressor restarts, but if
This anomaly occurs 4 times
within 30 minutes after the initial
detection.
4. Presumable cause
• Open the valves
• Faulty power source
• Insufficient refrigerant amount
• Faulty compressor
• Faulty power transistor
module
Note: 1. Between "TP_15V_+" and "TP_GND2" on the control PCB is the test point.
2. C541 on the inverter PCB is the test point.
Error code
Remote control:
7-segment display:
LED Green Red
Indoor
Outdoor
Content
YES
YES
YES
Is DC15V
output OK?
(Refer to note 1)
YES
YES
Is DC15V
output OK?
(Refer to note 2)
NO
NO
Replace control PCB.
Replace inverter PCB.
Single phase model Three phase model
*Check during
unit operating
*Check during
unit operating
NO
Fix them.
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