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Calorex Heat Pumps Ltd. · The Causeway, Maldon, Essex CM9 4XD, UK
Technical Manual
PPT8/12/16/22LX/LY SLIMLINE
SD638160 ISSUE 22d
®
8.0 Heat Pump
Malfunction
WARNING: Isolate heat pump electrically before entering heat pump or
removing panels.
The user check list should be carried out before initiating a service call.
Do not attempt to interfere with any internal control settings as these have
been factory calibrated and sealed.
Any sign of abnormal operation such as water dripping should be reported
immediately to the installer.
If in doubt or if advice is required contact Calorex Service Department.
Tel44(0)1621 857171 or 856611
8.1 User Check List
SYMBOL
DESCRIPTION
LAMP ON
LAMP FLASHING
LAMP OFF
DEFROST
HEAT PUMP IN
DEFROST
-
-
WATER HEATING
DEMAND FOR
WATER HEATING
WATER HEATING DEMAND
COMPRESSOR DELAY TIMER NOT
TIMED OUT
NO DEMAND FOR WATER
HEATING/ DEMAND
SATISFIED
FAN
FAN RUNNING
FAN NOT RUNNING
COMPRESSOR DELAY TIMER NOT
TIMED OUT
FAN NOT RUNNING
AUX
POOL PUMP
POOL PUMP
RUNNING
-
POOL PUMP NOT RUNNING
OFF
OFF LAMP
HEAT PUMP OFF
-
-
SYMBOL
DESCRIPTION
LAMP ON
LAMP FLASHING
ACTION
ALARM - FAULT
ILLUMINATES
WITH "to"
-
-
noF
WATER FLOW
LAMP
WATER FLOW OFF
OR INADEQUATE
WATER FLOW OFF OR
INADEQUATE
CHECK WATER PUMP
RUNNING AND ANY
EXTERNAL BYPASS VALVES
ARE CLOSED
to
THERMAL
OVERLOAD
(PPT16/22)
INTERNAL
OVERLOAD TRIP
-
CONTACT COMPETENT
ELECTRICIAN TO RESET
THERMAL OVERLOAD.
IF PROBLEM PERSISTS
CHECK SITE VOLTAGE
PrA
PRESSURE
SWITCH ALARM
HP/LP FAULT
-
CONSULT INSTALLER
SYMBOL
DESCRIPTION
LAMP ON
ACTION
E1-E1/
E2-E2
PROBE ERROR
PROBE INTERRUPTED,
SHORT CIRUIT OR
OUTSIDE RANGE
CHECK CONNECTION BETWEEN PROBES AND
THERMOSTAT
EPr
PROBE ERROR
INTERNAL EEPROM
MEMORY ERROR
SWITCH OFF HEAT PUMP AT MAINS SUPPLY FOR FIVE
MINUTES THEN SWITCH BACK ON. IF FAULT PERSISTS
CONTACT INSTALLER
The thermostat displays the following lamps during normal operation
If an error occurs any of the following lamps or messages will be displayed.
