Troubleshooting - Mitsubishi Electric PUHZ-W50 Installation Manual

9. Troubleshooting

Water does not heat or cool well.
Water or vapor is emitted from the outdoor unit.
The operation indicator does not appear in the remote controller display.
" " appears in the remote controller display.
When restarting the outdoor unit soon after stopping it, it does not oper-
ate even though the ON/OFF button is pressed.
FTC operates without the ON/OFF button being pressed.
FTC stops without the ON/OFF button being pressed.
Remote controller timer operation cannot be set.
"PLEASE WAIT" appears in the remote controller display.
An error code appears in the remote controller display.
■
Clean the fi lter of water piping. (Flow is reduced when the fi lter is dirty
or clogged.)
■
Check the temperature adjustment and adjust the set temperature.
■
Make sure that there is plenty of space around the outdoor unit.
■
During cooling mode, water may form and drip from the cool pipes and
joints.
■
During heating mode, water may form and drip from the heat exchang-
er of outdoor unit.
■
During defrosting mode, water on the heat exchanger of outdoor unit
evaporates and water vapor may be emitted.
■
Turn on the power switch. " " will appear in the remote controller dis-
play.
■
During external signal control, "
ler display and FTC operation cannot be started or stopped using the
remote controller.
■
Wait approximately 3 minutes. (Operation has stopped to protect the
outdoor unit.)
■
Is the on timer set?
Press the ON/OFF button to stop operation.
■
Is the FTC connected to a external signal?
Consult the concerned people who control the FTC.
■
Does " " appear in the remote controller display?
Consult the concerned people who control the FTC.
■
Has the auto recovery feature from power failures been set?
Press the ON/OFF button to stop operation.
■
Is the off timer set?
Press the ON/OFF button to restart operation.
■
Is the air conditioner connected to a central remote controller?
Consult the concerned people who control the FTC.
■
Does " " appear in the remote controller display?
Consult the concerned people who control the FTC.
■
Are timer settings invalid?
WEEKLY
If the timer can be set,
in the remote controller display.
■
The initial settings are being performed. Wait approximately 3 minutes.
■
If the remote controller is not only for FTC, change it.
■
The protection devices have operated to protect the FTC and outdoor
unit.
■
Do not attempt to repair this equipment by yourself.
Turn off the power switch immediately and consult your dealer. Be sure
to provide the dealer with the model name and information that ap-
peared in the remote controller display.
" appears in the remote control-
SIMPLE
AUTO OFF
, , or appears
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