Sanyo SPW-CR363GVH8 Service Manual page 180

1. Troubleshooting
(4) Symptom: LCD on the remote controller is displaying "CHECK E04". (Unusual communication between the indoor
1
The outdoor unit cannot communicate with the indoor unit. Or the power supply to the outdoor unit is off.
2
When the power is switched on for an indoor unit for which the outdoor unit and indoor unit addresses etc.
have been set, the number of units connected to the indoor unit and the number of units set for the outdoor
side do not match (other than when the outdoor system address is 0).
NOTE
When the outdoor system address is 0, if the indoor unit judges that the combination of indoor unit and outdoor
unit is inappropriate, the system starts automatic address setting operations and the remote controller displays
the "CHECK E15" or "CHECK E16" alarm.
Start
Cut the breaker and remove the
indoor/outdoor unit operating 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?
3
Cut the breaker, remove the
indoor/outdoor unit operating
lines connected to U1 and U2 of
the indoor unit 8P terminal plate.
Switch on the power. Do the alarm
LED (yellow) and LED 1, 2, 3, or
7 (red) light up after a few minutes?
Indoor/outdoor unit control line is cut off
Correct the wiring.
(5) Symptom: LCD on the remote controller is displaying "CHECK E05". (Unusual communication between the indoor
Indoor unit PCB transmission/
reception circuit defect
and outdoor units or inappropriate combination of indoor and outdoor units)
No
Yes
Yes
No
and outdoor units)
Start
Replace the indoor unit PCB.
0336_M_I
Is the contact good at the 2P
connector for indoor serial
communications on the outdoor
unit PCB?
Yes
Replace the indoor unit PCB.
Replace the outdoor unit PCB.
III - 14
Service Procedures
No
Correct the connections.
0335_M_I
SM830063