FILE NO. SVM-10020

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Block distinction

 

 

 

 

 

Operation of diagnosis function

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check

Block

 

Check

 

 

 

 

 

 

Air

Display flashing

Action and Judgment

 

 

Cause of operation

 

 

 

conditioner

 

code

 

 

code

 

 

 

 

error

 

 

 

 

 

 

 

 

 

 

status

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Serial signal

 

 

 

 

1) Defective wiring of the

 

 

 

 

Indoor unit

Flashes when

1) to 3) The outdoor unit never

 

 

and connecting

 

 

 

 

 

connecting cable or

 

 

 

 

operates

error is detected.

operate.

 

 

cable.

 

 

 

 

 

miss-wiring.

 

 

 

 

continue.

Flashing stop

Check connecting cable and correct

 

 

 

 

 

 

 

2) Operation signal has not

 

 

 

 

Outdoor unit

and outdoor unit

if defective wiring.

 

 

 

 

 

 

 

 

send from the indoor unit

 

 

 

 

stop.

start to operate

Check 25A fuse of inverter P.C. board.

 

 

 

 

 

 

 

 

when operation start.

 

 

 

 

 

 

when the return

Check 3.15A fuse of inverter

 

 

 

 

 

 

 

3) Outdoor unit has not

 

 

 

 

 

 

signal from the

P.C. board.

 

 

 

 

 

 

 

 

send return signal to the

 

 

 

 

 

 

outdoor unit is

Check operation signal of the indoor

 

 

 

 

 

 

 

 

indoor unit when operation

 

 

 

 

 

normal.

unit by using diode. Measure voltage

 

 

 

 

 

 

 

 

started.

 

 

 

 

 

 

 

at terminal block of the indoor unit

 

 

 

 

 

 

 

4) Return signal from the

 

 

 

 

 

 

 

between No.2 and No.3 (or L2 and S)

 

 

 

 

 

 

 

 

outdoor unit is stop during

 

 

 

 

 

 

 

If signal is varied 15-60V continuously,

 

 

 

 

 

 

 

 

operation.

 

 

 

 

 

 

 

replace inverter P.C. board.

 

 

 

 

 

 

 

 

Some protector

 

 

 

 

 

 

 

If signal is not varied, replace indoor

 

 

 

 

 

 

 

 

(hardware, if exist) of the

 

 

 

 

 

 

 

P.C. board.

 

 

 

 

 

 

 

 

outdoor unit open

 

 

 

 

 

 

 

4) The outdoor unit abnormal stop at

 

 

 

 

 

 

 

 

circuit of signal.

 

 

 

 

 

 

 

some time.

 

 

 

 

 

 

 

 

Signal circuit of indoor

 

 

 

 

 

 

 

If the other check codes are found

 

 

 

 

 

 

 

 

P.C. board or outdoor

 

 

 

 

 

 

 

concurrently, check them together.

 

 

 

 

 

 

 

 

P.C. board is failure

 

 

 

 

 

 

 

Check protector (hardware) such

 

 

 

 

 

 

 

 

in some period.

 

 

 

 

 

 

 

as Hi-Pressure switch,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Thermal-Relay, etc.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check refrigerant amount or any

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

possibility case which may caused

Note : Operation signal of the indoor unit shall be measured in the sending period as

high temperature or high pressure.

picture below.

 

 

 

 

 

 

 

 

 

 

 

 

Check operation signal of the indoor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Sending signal of the indoor unit when have not return

 

unit by using diode. Measure voltage

 

 

 

 

 

VDC

 

 

signal from the outdoor unit.

 

at terminal block of the indoor unit

 

 

 

 

 

 

 

 

 

 

 

 

 

between No.2 and No.3 (or L2 and S)

diode

 

 

 

 

 

 

 

 

 

 

***

 

 

60

 

 

 

 

 

 

 

 

 

 

 

 

 

 

If signal is varied 15-60V continuously,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

apply

 

 

 

 

 

 

 

 

 

 

 

 

 

 

replace inverter P.C. board.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

If signal is not varied, replace indoor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

by

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P.C. board.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

voltage

 

3 minutes Delay, start

 

 

 

3 minutes stop

 

 

 

 

 

 

 

 

 

 

 

*

 

 

**

 

 

 

 

 

 

 

counting from power

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

signal

 

supply ON or remote

 

 

 

 

Voltage variation stop

 

 

 

 

 

 

 

 

 

OFF.

 

 

 

 

output.

 

 

 

 

 

 

 

 

Measured

 

 

 

 

 

 

 

or have not voltage

 

 

 

 

 

 

 

 

15

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

3

 

4

7

8

 

Time (Min)

 

 

 

 

 

 

 

 

 

*Signal send only 1 minute and stop. Because of return signal from outdoor unit has not received. ** Signal resend again after 3 minutes stop. And the signal will send continuously.

*** 1 minute after resending, the indoor unit display flashes error.

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