Part 4 Trouble Shooting

Error code

Description

Cause of error

 

 

 

 

Over current Error

• Supplied power is not normal

7

• Indoor/outdoor fan is locked

(CT2)

• Too much refrigerant

 

 

 

• Defect in current sensing circuit in outdoor pcb assembly

 

 

 

Check flow

Supplied voltage to Outdoor pcb is about AC 208~230V ?

No

Check power source

YES

Does indoor / outdoor fan work normally ?

No

Check indoor / outdoor fan and adjust.

YES

Refrigerant pressure is right ?

No

Check refrigerant pressure and adjust.

YES

Current sensing circuit is right ?

No

Check current sensing circuit.

-check CT is damaged in outdoor pcb (output wire is disconnected to pin or not)

-BD01N is inserted in right position

(refer to marking on pcb and component)

-Spec of R01N (1k), R02N (1.65k) is correct

-Direction of diode (D01N, D02N) is right

- 52 -

Only for training and service purposes

Page 52
Image 52
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