Technical data

6 ELECTRICAL HEATER DOES NOT WOR
K
Before checking the unit with this test, follow these 3 steps
1) Switch the unit in FAN HEATER mode and fan on LOW speed for 3 minutes
2) Measure the power or current consumption directly from the power supply lin
e
Clean the air filter
Measure the
resistance of the
heater. Is it
defective?
YES
NO
Check pump
relay(RP) and
power relay
(PR)
NO
YES
Is the consumption
much lower than the
declared power input of
resistance?
YES
Push reset button of safety
thermostat and remeasure
the power input. Does the
resistance work?
YES
Is the room
temperature higher
than 32°C
Repeat the test
with a temperature
lower than 32°C
YES
NO
NO
Check the air filter. Is
it clogged?
Check if the airflow
is adequate
NO
Measure resistance
of indoor fan motor
(FMI)
Change fan
motor
Replace the
heater resistance
YES
Check continuty of safety
thermostat (SF) and automatic
thermostat (AT). Is there any
defective thermostat?
Replace the
faulty
thermostat
Replace the
faulty relay
Pagina 27