Mitsubishi Electric MSZ-EF42VES Manuel de service télécharger pdf (Page 27)

D How to check miswiring and serial signal error

MUZ-EF Type

Turn OFF inverter-controlled lighting

equipment.

Turn OFF the power supply and then

turn ON again.

Press EMERGENCY OPERATION

switch.

•

Is serial signal

error indicated 6

minutes later?

Yes

Reinstall

either the unit

or the light

away from

each other.

Attach a ﬁ lter

on remote

control receiv-

ing section

of the indoor

unit.

•

Turn the main power supply

OFF.

Is there rated voltage in the power supply?

Yes

Check for incorrect indoor-outdoor connecting wiring.

Check the power supply.

Is there rated voltage between outdoor terminal block S1 and S2?

Yes

Check for miswiring, broken wires, and loose

wire connection between the main power

supply and outdoor terminal block S1 and

between the main power supply and outdoor

terminal block S2.

Wait for 2 or more minutes after the main power supply is turned on.

Touch S2 and S3 with tester probes and start the emergency operation.

When the emergency operation starts, does the rated voltage occur for 2

seconds between indoor terminal block S2 and S3?

Yes

Turn the main power supply

OFF.

Turn the main power supply

ON.

Wait for 2 or more minutes after the main power sup-

ply is turned ON. Touch CN202

and JPG with tester

probes and start the emergency operation.

During the emergency operation,

does DC (2V or more) occur for 2

seconds between CN202

and

JPG on the indoor electronic control

P.C. board?

Does the indoor OPERATION

INDICATOR lamp (left) blink

continuously 6 minutes after the

emergency operation starts?

Does the outdoor LED light up?

Replace the

indoor electronic

control P.C. board.

Replace the

indoor power P.C.

board.

Yes

Does the outdoor LED blink 6

times?

Yes

Conﬁ rm that the thermostat is OFF

and wiring is not loose.

Does DC (6V or more) occur

between indoor terminal block S2

and S3?

Yes

Replace the outdoor inverter P.C. board.

Turn the main power supply OFF.

Replace the indoor power P.C.

board.

Start the emergency operation.

Yes

Repair completed.

Does DC (20V or more) occur

between indoor terminal block S2

and S3 ?

Yes

Replace the outdoor inverter P.C. board. 1

Replace the indoor electronic

control P.C. board.

Electric charge may remain immediately

after the main power supply is turned OFF.

Perform the procedure after 3 minutes.

Replace the outdoor inverter P.C. board. 1

Turn the main power supply ON.

Does the indoor OPERATION

INDICATOR lamp (left) blink

continuously 6 minutes after the

emergency operation starts?

Yes

Turn the main power supply ON.

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 ... 35 36

Commentaires sur ces manuels

Pas de commentaire

Mitsubishi Electric MSZ-EF42VES Manuel de service Page 27

Commentaires sur ces manuels

Produits connexes et manuels pour Climatiseurs à système divisé Mitsubishi Electric MSZ-EF42VES