Worcester Greenstore Instruction Manual page 61

Compressor temperature T6 (GT6)
Possible cause 1: The working temperature of the compressor is
too high.
Possible cause 2: Intermittent temperature rise due to abnormal
operating conditions.
Low pressure switch (LP)
Possible cause 1: Air in the heat collector system.
Possible cause 2: The filter on the collector circuit is blocked.
Possible cause 3: Lack of refrigerant in the refrigerant circuit.
Possible cause 4: The heat transfer fluid pump has stopped or is
set at too low a speed.
Possible cause 5: Ice formation in the evaporator due to a lack
of anti-freeze in the heat collector circuit.
Possible cause 6: Faulty expansion valve (the alarm appears in
time periods of 3-4 weeks).
Alarm (GT6)
Compressor superheat
040622 16:08:15
Info Ackn.
Alarm (LP)
Low pressure switch
040622 16:08:15
Info Ackn.