Technibel KPAVM93R5TAA Technical Data & Service Manual page 33

4) Symptom:
S
TART
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?
Yes
Y
ES
Indoor/outdoor unit
control lines are cut off
Correct the wiring.
5) Symptom:
LCD on the remote controller is displaying "CHECK E04". (Unusual communication
between the indoor and outdoor units.)
No
Is the contact good at the 2P
connector for indoor serial
communications on the outdoor
unit PCB?
Replace the indoor unit PCB.
No
Is the contact good at the 2P
connector for indoor serial
communications on the outdoor
unit PCB?
Replace the indoor unit PCB.
LCD on the remote controller is displaying "CHECK E05". (Unusual communication
between the indoor and outdoor units)
S
TART
0336_M_I
No
Yes
No
33
Correct the connections.
Correct the connections.
0335_M_I