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