Mitsubishi MS-18RV Manuel de service télécharger pdf (Page 56)

How to check mis-wiring

1. Turn OFF the power supply and disconnect the indoor/ outdoor unit connecting wire

at the terminal block 3 of the indoor unit.

2. Short-circuit terminal block N-3 of indoor unit by lead wire.

3. Turn ON the power supply and press once EMERGENCY OPERATION switch.

During EMERGENCY OPERATION, is there

10V DC between both ends of R601 on the

deicer P.C. board.? Refer to page 60.

(By tester, the stylus is between 5 ~10V)

Start

Is there 1V DC between both ends of

PS132 on the indoor electronic control P.C.

board ?

( By tester, the stylus is between 0 ~ 1V. )

• Turn ON the power supply.

• Press once EMERGENCY OPERATION switch.

Is this mis-wiring, poor contact,

or wire disconnection?

Make them sure.

Replace the indoor electronic

control P.C. board.

Is there 220-240V AC between L - N

on the terminal block of the outdoor unit?

Yes

Check of outdoor power

supply and connecting of wiring.

Yes

Make the wiring between CN730

on the deicer P.C. board and

outdoor terminal block correct.

(Refer to page 60.)

Replace the deicer P.C. board.

Yes

After 3 minutes, mis-wiring is indicated

(0.5-second ON, 0.5-second OFF)

on OPERATION INDICATOR

lamp on indoor unit.w

w Short circuit of JPG and JPS on the indoor electronic control

P.C. board enables self -check to be displayed in 3 seconds.

• Turn OFF the power supply.

• Disconnect the lead wire that terminal

block N-3 of the indoor unit is short-circuited.

• Connect ON indoor/ outdoor unit connecting wire.

Turn ON the power supply.

Is there 5V DC between J101 + -J401 -

on the deicer P.C. board? Refer to page 60.

Yes

Replace the deicer P.C. board.

Outdoor unit doesn’t operate.

<MS-30RV only>

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Mitsubishi MS-18RV Manuel de service Page 56

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