Sharp R-426H Service Manual download pdf (Page 154)

4. Service procedures

IV - 17

13) Symptom: LCD on the remote controller displays “CHECK P05”. (Negative phase

detection operation warning)

Yes

0345_M_I

Start

Check the power breaker etc.

and repair

No problem

Correct the connection

Replace the outdoor PCB

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 there a contact defect in the

3P connector?

Yes

Replace the fuse.

Is the fuse (F1, F2) on the indoor

unit PCB blown?

14) Symptom: LCD on the remote controller displays “CHECK E15”.

Yes

0646_M_S

Start

Repair the wiring.

Select an indoor unit which matches

with the outdoor capacity.

Check the contact.

Perform the same as “CHECK E04”.

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?

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Sharp R-426H Service Manual Page 154