Malfunction
Possible causes
Checks
Remedial measures
The unit is running but
only provides reduced or
no cooling or heating
capacity.
Filter is dirty / air inlet /
outlet opening is blocked
by debris.
Have the filters been
cleaned?
Clean the filters
Windows and doors
open. Heating / cooling
load has increased
Have structural / usage
modifications been
made?
Close windows and
doors / install additional
units
Neither cooling nor
heating mode has been
set
Does the cooling symbol
appear on the display?
Correct the settings for
the unit
Fins on outdoor unit
blocked by foreign
objects
Does the fan of the out-
door unit work? Are the
exchanger fins unob-
structed?
Check the fan or winter
fan speed control,
reduce the air resistance
Leaking cooling cycle
Are there signs of frost
on the exchanger fins of
the indoor unit?
Repair by specialist
Outdoor unit iced up
Check outdoor unit. Has
the cassette probe on
the outdoor unit been
correctly positioned?
De-ice and fit the probe
at the point where the
most ice forms
Condensate discharge
on unit
Drainage pipe on collec-
tion container clogged /
damaged
Can the condensate
drain off without any
obstruction?
Clean the drainage pipe
and collection container
Faulty external conden-
sate pump or float
Is the collection tray full
of water and the pump
not running?
Call out a specialist to
replace the pump
Condensate has not
drained away and has
collected in the conden-
sate drainage line
Is there an incline on the
condensate drainage
line? Check there is no
blockage in the pipe.
Ensure there is an incline
when laying the conden-
sate drainage line and
clean the pipe.
Condensate does not
drain off
Are the condensate
drainage lines unblocked
and is there a steady
incline? Are the conden-
sate pump and liquid
level switch functioning
correctly?
Route the condensate
drainage line with an
incline and clean it. If the
liquid level switch or the
condensate pump is
defective, have them
replaced.
Float is stuck or jammed
due to excessive dirt.
Are the LEDs on the
receiver unit of the
indoor unit flashing?
Should be cleaned by
specialist firm
REMKO ML...DC
46
