Worcester Greenstore Instruction Manual page 62

High pressure switch (HP)
Possible cause 1: Air in the primary circuit.
Possible cause 2: Not enough primary flow over the heat pump.
Possible cause 3: The filter on the primary circuit is blocked.
Electric heater (EK)
Possible cause 1: The electric heater miniature circuit-breaker
has tripped.
Possible cause 2: The electric heater’s overheat protection has
tripped.
Alarm (HP)
High press. switch
040622 16:08:15
Info Ackn.
Note
Increase the speed of the
primary pump:
Alarm (EK)
Electrical cassette
(EE) 040622 16:08:15
Info Ackn.
Note