Sanyo KH2442 / CH2442 User Manual download pdf (Page 167)

Section

IV - 11

SM830082

4. Service procedures

4) Symptom: LCD on the remote controller is displaying “CHECK E04”. (Unusual

communication between the indoor and outdoor units.)

5) Symptom: LCD on the remote controller is displaying “CHECK E05”. (Unusual

communication between the indoor and outdoor units)

Yes

No No

Yes

0335_M_I

Start

Is the contact good at the 2P

connector for indoor serial

communications on the outdoor

unit PCB?

Is the contact good at the 2P

connector for indoor serial

communications on the outdoor

unit PCB?

Correct the connections.

Replace the indoor unit PCB.

Indoor/outdoor unit

control lines are cut off

Correct the wiring.

Cut the breaker, remove the

indoor/outdoor unit control

lines connected to U1 and U2 of

the outdoor unit 8P terminal plate.

After shorting the test pin (CN11) on

the outdoor unit PCB, switch the

breaker on. Do the LEDs (red, × 2)

on the PCB flash?

Cut the breaker and remove the

indoor/outdoor unit control lines

connected to U1 and U2 of the

indoor unit 8P terminal plate.

After shorting the test pin (CN2)

on the indoor unit PCB, switch the

breaker on. Does the LED

(red) on the PCB light up?

0336_M_I

Start

Indoor unit PCB transmission/

reception circuit defect

Replace the indoor unit PCB.

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Sanyo KH2442 / CH2442 User Manual Page 167

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