Mitsubishi Electric PLA-RP50 Service Manual download pdf (Page 37)

11-3-3. Check point of trouble

Turn OFF : No power supply

Blink : Storage detection switch ON (short)

One blink : Storage detection switch OFF (open)

Two blinks : Tension detection switch OFF (open)

Check item Check point Normal Remarks

Up/down controller

P.C. board supply

voltage

CN3A

(between 3-5)

AC 198~264 V

Up/down machine

supply voltage

CN2B, CN2C DC 10~12 V

Check when instructing up/down with LED

blinking once.

Check item Check point Normal Check contents

Storage detection

switch

CN2E open or short Check if it is short when pressing push switch.

Tension detection

switch

CN2F, CN2G open or short Check if it is short when wire b is tensioned.

Motor CN2B, CN2C 5~20  Check if it is not open or short.

Entwining wires Pull wire

Retension:

about 2 kgf

Check if wire is drawn out by pulling with 3 kgf.

•

Check the following points.

Problem Possible Reason Corrective Action

Air-conditioner is running. Stop running the air-conditioner and try again.

After recovering from power failure, try again.

Insert or replace the battery.

Remove the objects or obstacles from the

air intake grille.

Or, remove the stuck object.

Remove the objects or obstacles from the

air intake grille.

Lower the air intake grille again and check

whether the filter is installed in the correct

position.

Lower the air intake grille again and hook

on the air intake grille.

This is normal.

Power failure

Batteries are not inserted into the wireless remote controller.

Or battery power is running low.

There is something on the air intake grille.

Or something is stuck in the air intake grille.

There is something on the air intake grille.

Filter is not properly installed.

Air intake grille is not hung with all 4 hooks.

The air intake grille has finished lowering to the auto-stop

position.

This is the noise made when the wire is wound and

unwound.

This is the operational noise for putting the air intake

grille into place.

This is the operation for putting the air intake grille into

place.

The speeds of winding/unwinding wires are slightly

different for each wire.

Air intake grille does not

function with operation of the

wireless remote controller.

Air intake grille cannot be

fixed in place.

Air intake grille stops lowering.

(Air intake grille would not

lower any further.)

Noises are made during

up/down operation.

(While air intake grille is

moving up/down.)

Noises are made while putting

the air intake grille into place.

Air intake grille repeats rising

and lowering several times

while being put into place.

Air intake grille leans toward

one side during the up/down

operation.

11-4. TROUBLESHOOTING

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Mitsubishi Electric PLA-RP50 Service Manual Page 37

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