Is the voltage moving
negative?
The voltage moves alternately with
positive value.
Measure Vs. (Vs is the voltage between S and N of
outdoor unit. Red pan-S, Black pan-N)
Is it normal?
Power on.
Check the reactor.
Is the error resolved?
Power on.
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.
Recommended parts to prepare:
• Faulty indoor PCB
• Faulty outdoor PCB
• Faulty reactor
Troubleshooting and repair:
NO
YES
NO
YES
YES
NO
NO
Page 73
Replace the outdoor PCB.
Is it normal?
Check the indoor wiring
connections
Is the error
NO
Replace the indoor PCB.
Power off, then restart the unit after 2 minutes.
Does a problem remain?
The unit is operating normally
Is it normal?
Check the outdoor wiring connection.
reactor
The voltage is a
certain value
Trou
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sho
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