Mitsubishi Electric CITY MULTI PEFY-P54NMAU-E4 Manuel D'utilisation page 8

6. Troubleshooting
W hen an error occurs, the following screen will appear and the operation LED will blink .
Check the error status, stop the operation, and consult your dealer.
Error code, error unit, refrigerant address, unit model name, and serial number w ill appear.
Th e model name and serial number w ill appear only if th e information h as been registered.
Press th e [ F1] or [ F2] button to go to th e next page.
B efore you ask for repair service, check the following points:
State of Mach ine Remote Controller
It does not run. Ruled line and clock are not
displayed.
No display appears even w h en
th e [ ON/ OFF] button is pressed.
Air o s out but it does
Th e liquid crystal display sh ow s
not cool enough or h eat th at it is in th e state of operation.
enough .
Cool air or w arm air does Th e liquid crystal display sh ow s
not come out. th at it is in operation.
It runs brie y, but soon
Th e " CHECK " and ch eck code
ash on the liquid crystal display.
stops.
Th e sound of th e exh aust All ligh ts are out except th e ruled
and rotation of th e motor line and clock.
can still be h eard after
stop of running.
Th e sound of th e exh aust All ligh ts are out except th e ruled
and th e rotation of th e
line and clock.
motor can be h eard
intermittently after stop of
running.
Warm air comes out Th e liquid crystal display sh ow s
intermittently w h en th e th at it is in th e state of operation.
th ermostat is OFF or
during fan operation.
• If operation stops due to a pow er failure, th e [ restart-preventing circuit at pow er failure] operates and disables unit operation even after pow er restoration. In th is case, press
th e [ ON/ OFF] button again and start operation.
If malfunctions persist after you h ave ch ecked th e above, turn th e pow er supply OFF and contact your dealer w ith information about th e product name, th e nature of th e
malfunction, etc. If the display of error information ashes, tell the dealer contents of the display (error code). Never attempt to repair by yourself.
The following symptoms are not air conditioner failures:
The air blo n out from the air conditioner can sometimes give off odors. This is
•
due to cigarette smoke contained in th e air of th e room, th e smell of cosmetics, th e
w alls, furniture, etc., absorbed in th e air conditioner.
• A h issing noise can be h eard immediately after th e air conditioner is started or
stopped. This is the sound of the refrigeration o ing inside the air conditioner. This
is normal.
8
Cause
Pow er failure
Th e pow er supply is turned OFF.
Th e fuse in th e pow er supply is gone.
Th e earth leakage breaker is gone.
Improper temperature adj ustment
The filter is filled ith dust and dirt.
Th ere are some obstacles at th e air inlet
and outlet of th e indoor and outdoor units.
Window s and doors are open.
Th e restart-preventing circuit is in operation
for 3 minutes.
Indoor unit operation w as restarted during
th e h eating and defrosting operation.
Th ere are some obstacles at th e air inlet
and outlet of th e indoor and outdoor units.
The filter is filled ith dust and dirt.
Wh en oth er indoor units are engaged in
cooling operation, th e mach ine stops after
running a drain-up mech anism for 3 minutes
w h en air-cooling operation is stopped.
Wh en oth er indoor units are engaged in
cooling operation, drained w ater is brough t
in. If th e drain w ater is collected, th e drain-
up mech anism initiates a draining operation.
Wh en oth er indoor units are engaged in
h eating operation, th e control valves are
opened and closed from time to time to
maintain th e stability of th e system.
• Th e air conditioner sometimes snaps or clicks at th e beginning or end of cooling/
h eating operation. Th is is th e sound of friction on th e front panel and oth er sections
due to expansion and contraction caused by temperature ch ange. Th is is normal.
• Th e fan speed ch anges in spite of not ch anging th e setting. Not to blow out cold
air at th e beginning of h eating operation, th e air conditioner automatically adj usts
th e fan speed gradually from low er to th e set speed. It also adj ust its fan speed to
protect th e fan motor w h en return air temperature or fan speed excessively rises.
Troublesh ooting
Press th e [ ON/ OFF] button after pow er restoration.
Turn th e pow er supply ON.
Replace fuse.
Put in th e earth leakage breaker.
After ch ecking th e set temperature and inlet temperature on th e
liquid crystal display, refer to section 3.3 " Set temperature" , and
operate th e adj ustment button.
Clean up the filter.
(Refer to section 5 " Caring for th e mach ine" .)
Remove.
Close.
Wait for a w h ile.
(To protect th e compressor, a 3- minute restart-preventing
circuit is built into th e indoor unit. Th erefore, th ere are occasions
sometimes w h en th e compressor does not start running
immediately. Th ere are cases w h en it does not run for as long as
3 minutes.)
Wait for a w h ile.
(Heating operation starts after ending defrosting operation.)
Rerun after removal
Rerun after cleaning the filter. (Refer to section 5 Caring for the
mach ine" .)
Wait for 3 minutes.
It soon stops. (If th e noise occurs more th an 2-3 times in an h our,
ask for repair service.)
It soon stops. (If th e room temperature rises uncomfortably h igh
in a small room, stop operation.)