Table of Contents
Advertisement
38MGRBQ: Service Manual
DIAGNOSIS AND SOLUTION (CONT)
E2/ EL 01 (Communication malfunction between indoor and outdoor units) diagnosis and solution
ERROR CODE
MALFUNCTION DECISION
CONDITIONS
SUPPOSED CAUSES
Troubleshooting
Communication malfunction between indoor and
Start: power off, then use the
breaker to power on the unit.
Reconnect the power wire.
Does the error code still appear?
Check wiring on the outdoor and indoor
terminal using the wiring diagram.
Turn on the indoor unit by remote
controller. Does the indoor unit
Turn off the all indoor units. Is IPM
power LED or operating LED lamp on?
Is indoor units number correct? Check
on the outdoor check point . (2 for dual
zone, 3 for tri zone, 4 for qua zone).
Change outdoor unit PCB assembly
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
E2/ EL 01
Indoor unit does not receive the feedback from outdoor unit during 120 seconds or outdoor unit does not
receive the feedback from any one indoor unit during 180 seconds.
Wiring mistake
Faulty indoor or outdoor PCB
outdoor units
Yes
No
Is it connected correctly?
Yes
No
power on?
Yes
Yes
No
Refer to PIC 2
Yes
Is main board
No
lamp on? Refer PIC 3.
Yes
Refer PIC 4.
No first time
No second time
(include wiring)
Reconnect the wiring
Reconnect the wiring
Measure Vs, is it moving
alternately between positive value
and negative value? (Vs is the
voltage between S and L2). Refer
to PIC 1
Yes
change IPM
No
Reconnect the wiring
Is the reactor connected
Yes
Change the outdoor Main PCB
A
46
No
A:
Is all the wiring between
No
terminal and the indoor PCB
well connected?
Yes
Change the Indoor PCB
Power on by remote
controller, I
s it still
displaying the error code
after 3 minutes?
No
Problem solved
No
Advertisement
Table of Contents
