CLIMATE 5000 RAC SINGLE SPLIT (R32) – 6720894076 (2019/08) 45
Troubleshooting
5.5.3 E1 (Indoor and outdoor unit communication error)
Description: The indoor unit has not received feedback from the outdoor unit for 110 seconds, four consecutive times.
Possible defects:
• Faulty indoor PCB
• Faulty outdoor PCB
• Faulty reactor
Troubleshooting and repair:
Power off, then restart the unit after 2 minutes.
Measure Vs. (Vs is the voltage between S and N of outdoor
unit. Red pan-S, Black pan-N)
The voltage moves alternately with positive value.
Check the outdoor wiring connection
Is the voltage moving alternately
between positive and negative?
The unit is operating normallyDoes a problem remain?
Is it normal?
Is it normal?
Replace the
reactor
Is the error
resolved?
Is it normal?
Is the error resolved?
Check the reactor.
Replace the indoor PCB.
Replace the outdoor PCB.
Power on.
The voltage is a certain value
Replace the outdoor PCB.
Check the indoor wiring connections
Replace the indoor PCB.
Power on.
NO
NO
NO
YES
YES
YES
YES
NO
NO
NO
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