4) Symptom:
LCD on the remote controller is displaying “CHECK E04”. (Unusual communication
between the indoor and outdoor units.)
5) Symptom:
LCD on the remote controller is displaying “CHECK E05”. (Unusual communication
between the indoor and outdoor units)
Y
ES
No
No
Yes
No
Yes
0335_M_I
S
TART
Is the contact good at the 2P
connector for indoor serial
communications on the outdoor
unit PCB?
Is the contact good at the 2P
connector for indoor serial
communications on the outdoor
unit PCB?
Correct the connections.
No
Correct the connections.
Replace the indoor unit PCB.
Replace the indoor unit PCB.
Indoor/outdoor unit
control lines are cut off
Correct the wiring.
Cut the breaker and remove the
indoor/outdoor unit control lines
connected to U1 and U2 of the
indoor unit 8P terminal plate.
After shorting the test pin (CN2)
on the indoor unit PCB, switch the
breaker on. Does the LED
(red) on the PCB light up?
0336_M_I
S
TART
33
