Worcester GREENSTORE Instruction Manual page 39

Compressor temperature T6 (GT6)
Possible cause 1: The working temperature of the compressor is
too high.
Action: 1. Press the Ackn. button.
2. Contact the Technical Support Department at
repeated alarms.
Possible cause 2: Intermittent temperature rise due to abnormal
operating conditions.
Action: 1. Press the Ackn. button.
2. Monitor to see if fault clears.
Low pressure switch (LP)
Possible cause 1: The HTF pump has stopped or is set at too low
a speed.
Action: 1. Press the Ackn. button.
2. Check that the pump has not stopped or is set at
the wrong speed.
Possible cause 2: The fi lter on the collector circuit is blocked.
Action: 1. Check the fi lter.
2. Clean the fi lter if necessary.
3. Press the Ackn. button.
Possible cause 3: Air in the collector system.
Action: 1. Press the Ackn. button.
2. Check the expansion vessel.
3. Fill with fl uid if necessary.
4. Listen for air in the system. If air is heard con-
stantly, contact the Technical Support Department.
Possible cause 4: Ice formation in the evaporator due to a lack of
anti-freeze in the collector circuit.
Action: 1. Contact the Technical Support Department.
Possible cause 5: Faulty expansion valve (the alarm appears in
time periods of 3-4 weeks).
Action: 1. Contact the Technical Support Department.
Possible cause 6: Lack of refrigerant in the refrigerant circuit.
Action: 1. Press the Ackn. button.
2. Wait for the heat pump to start.
3. Check whether it bubbles continuously in the sight
glass.
4. If it bubbles continuously, contact the Technical
Support Department.
39
What to do if a fault occurs
The menu display shows:
ALARM (GT6)
Compr. superheat
060822 16:08:15
Info Ackn.
The menu display shows:
ALARM (LP)
Low pressure switch
060822 16:08:15
Info Ackn.