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13. Troubleshooting table
Fault Cause
Remedy
The appliance does not operate
There is no power supply
Check the power supply
The appliance does not start
The regulator does not start the appliance
Check the functioning of the regulator
Room temperature is high
The appliance does not operate
Detect the cause of not starting
Wrong setting values
Change the setting values
Air volume too low
Check the filters
The compressor does not start
See the item ‘compressor does not operate’
The automatics does not function
Check the regulating equipment
The load exceeds the nominal load
Accept the small rise in heat
Room temperature is low
Wrong setting value
Change the setting value
The regulator does not function
Check the regulator and the sensors
Low air volume
No power supply
Check the power supply
The filter is clogged
Clean the filter
The thermal protection of the fan is
switched on
Switch off the thermal protection, detect the
cause
High pressure switch switches on The control of the condensation
pressure does not function
Check the control of the condensation pressure
The fan of the condenser has stopped
Detect the cause of stopping
The high pressure switch is set incorrectly
Replace the switch
Low pressure switch switches on The low pressure switch is set incorrectly
Replace the switch
The condensation pressure is too low
Increase the setting of the regulator
The battery is frozen
Defrost the appliance, check the freezing protection
board
The filter of the evaporator is clogged
Clean the filter
The compressor does not operate The fuse has switched on
Check the fuse and detect the cause
The thermal protection has switched on
Check the thermal protection and detect the cause
The contactor does not function
Replace the contactor
The compressor does not receive a starting
command Check
the
automatics
The free cooling does not function The damper motor does not operate
Repair or replace the damper motor
Wrong setting values in the regulator
Change the setting values
The control system does not function
Repair the control system
The damper motor remains open The damper motor is damaged
Repair or replace the damper motor
