4. Service procedures
13)Symptom: LCD on the remote controller displays “CHECK P05”. (Negative phase detection operation warning)
Start
Is the power supply to the outdoor No unit normal?
(Voltage defective phase?)
Yes
Yes
Does the outdoor unit operate when two of the three phases are changed? (Actuation of negative phase protector)
No
Yes
Is the fuse (F1, F2) on the indoor unit PCB blown?
Check the power breaker etc. and repair
No problem
Replace the fuse.
No
Is there a contact defect in the 3P connector?
No
Replace the outdoor PCB
Yes
Correct the connection
4
0345_M_I
14) Symptom: LCD on the remote controller displays “CHECK E15”.
Start
|
| Yes |
| |
When the group of the units are |
| |||
Repair the wiring. | ||||
installed, is there any |
| |||
|
| |||
between interunit control wiring and |
|
| ||
refrigerant tubing? |
|
| ||
|
|
|
| |
| No |
|
| |
Are the total capacities of indoor units to that of outdoor units less than 93%?
No
Are there no contact failure between outdoor and indoor units?
No
Yes
Yes
Select an indoor unit which matches with the outdoor capacity.
Check the contact.
Perform the same as “CHECK E04”.
0646_M_S
SM830082
IV - 16
