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13) Symptom: LCD on the remote controller displays "CHECK P05". (Negative phase
detection operation warning)
Is the power supply to the outdoor
unit normal?
(Voltage defective phase?)
Does the outdoor unit operate when
two of the three phases are changed?
(Actuation of negative phase protector)
Is the fuse (F1, F2) on the indoor
unit PCB blown?
Is there a contact defect in the
3P connector?
Replace the outdoor PCB
14) Symptom: LCD on the remote controller displays "CHECK E15".
When the group of the units are
installed, is there any mis-cross
between interunit control wiring and
refrigerant tubing?
Are the total capacities of indoor units
to that of outdoor units less than 93%?
Are there no contact failure between
outdoor and indoor units?
Perform the same as "CHECK E04".
Start
No
Yes
Yes
No
Yes
No
Yes
No
Start
Yes
No
Yes
No
Yes
No
IV - 17
Check the power breaker etc.
and repair
No problem
Replace the fuse.
Correct the connection
0345_M_I
Repair the wiring.
Select an indoor unit which matches
with the outdoor capacity.
Check the contact.
0646_M_S
4. Service procedures
SM830080
1
2
3
4
5
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Table of Contents
Troubleshooting
