2 5
2 5
2 5
2 5
2 5
Probl em
Probabl e cause
Sol uti on
Insufficient refrigerant fluid charge.
Top up the refrigerant fluid charge.
Clogged dehumidification filter.
Replace the dehumidification filter.
Reduced output from one or both circuits
Check the compressor valves and change them if necessary.
The overheating setting on the thermostatic
pressure relief valve is too low.
Increase the setting.
Check the refrigerant fluid charge
Vibrating pipe work
Attach the pipe work correctly.
Check the pipe work attachments.
Whistling noise from the thermostatic pressure
relief valve
Top up the refrigerant fluid charge.
Check and replace the dehumidification filter if necessary.
Noisy compressor
Check the condition of the valves.
Seized bearings. Replace the compressor
Check the tightness of the compressor attachment nuts.
Low oi l l evel i n the
Presence of one or several oil or gas leaks in the
circuit
Locate and repair the leaks
compressor
Mechanical compressor damage.
Contact an approved Service Centre.
Sump oil heater resistance fault.
Check the electrical circuit and the condition of the
resistance. Replace defective parts if necessary.
Electrical circuit cut.
Check the electrical circuit and seek out any grounding
and/or short- -circuits. Check the fuses.
High pressure pressostat activated.
Reset the pressostat from the control panel and restart the
unit. Identify and eliminate the causes of this activation.
Control circuit fuse blown.
Check the control circuit and seek out any grounding and/or
short-circuits. Replace the fuses.
Connection problem
Check the tightness of all the electrical connection terminals.
Electrical circuits thermal protection cuts in.
Check the operation of the control and safety devices.
Identify and eliminate the cause of the activation.
Incorrect wiring.
Check the wiring of the control and safety devices.
Mains voltage too low.
Check the power line. Eliminate any possible problems
associated with the system. If the problem is due to the
network, inform the Electricity Company.
Compressor motor short–circuited.
Check the continuity of the motor winding.
Compressor seized
Replace the compressor.
Presence of a leak.
Identify and repair the leak.
Insufficient refrigerant fluid charge.
Top up the refrigerant fluid charge.
Pressostat operating fault.
Replace the pressostat.
Incorrect operation of the high pressure
pressostat.
Check the operation of the pressostat. Replace it if required.
Outlet valve partially closed.
Open the valve. Replace it if required.
Non-condensable particles in the circuit.
Bleed the circuit
Condenser fan(s) not operating.
Check the wiring and the motors. Repair and replace if
required.
Li qui d l i ne t oo hot
Insufficient refrigerant fluid charge.
Locate and eliminate the causes of charge losses and top up
the refrigerant fluid charge.
Liquid line valve partially closed.
Checking the opening of all the valves.
Clogged dehumidification filter.
Replace the filter cartridge.
Electrical circuit problems.
Check the connections.
Internal circuit thermal cut-out activated.
Contact an approved Service Centre.
Uni t operates
conti nuousl y but wi thout
generat i ng cool i ng
Frozen i nt ake l i ne
Excessi ve noi se
Fans do not operat e.
One or both compressors
do not operat e.
Ci rcui t stoppage furt her
to t he l ow pressure
thermost at bei ng
act i vat ed.
Ci rcui t stoppage furt her
to t he hi gh pressure
thermost at bei ng
act i vat ed.
Li qui d l i ne frozen
TROUBLE SHOO
TROUBLE SHOO
TROUBLE SHOO
TROUBLE SHOO
TROUBLE SHOOTING
TING
TING
TING
TING