Allied 4DHV Mini-Split Series - Error Codes and Troubleshooting; Error Code E1 Diagnosis

508067-01Issue 2016Page 62 of 75
Error Code: E1
Description: Communication malfunction between outdoor unit and all indoor units.
General Note: The indoor unit has not received feedback from the outdoor unit for 110 seconds, four consecutive times
Is the voltage moving
alternately between posive and
negave?
NO
The voltage moves alternately with
posive value.
Measure Vs. (Vs is the voltage between 2 and 3)
Is it normal?
YES
Replace the outdoor PCB.
Power on.
Check the reactor.
Is the error resolved?
Replace the indoor PCB.
Power on.
NO
YES
NO
YES
YES
NO
NO
Replace the outdoor PCB.
Is it normal?
Check the indoor wiring
connecons
Is the error
resolved?
NO
Replace the indoor PCB.
Does a problem remain?
The unit is operang normally
Is it normal?
Check the outdoor wiring connecon.
Replace the
reactor
The voltage is a
constant value
Power of system, restart after two minutes
(L2 and L3)