Heat Pump Malfunction; User Check List - Calorex PPT16 BHC Owners & Installation Manual

PPT16/22 BHC & PPT16BMCY OWNER INSTALLATION MANUAL

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.

8.1 USER CHECK LIST

LAMP
MAINS RED
FAULT AMBER
DEFROST/
CLEAR
CHILL LIMIT
MAINS RED
FAULT AMBER
DEFROST/
CLEAR
CHILL LIMIT
MAINS RED
FAULT AMBER
DEFROST/
CLEAR
CHILL LIMIT
LAMP
MAINS RED
FAULT AMBER
DEFROST/ CLEAR
CHILL LIMIT
LAMP
MAINS RED
FAULT AMBER
DEFROST/ CLEAR
CHILL LIMIT
SYMBOL DESCRIPTION
E1-E1/E2-E2 Probe error
EPr Probe error
20
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 the Dantherm Group UK Service
Department.
Telephone +44(0)1621 856 611
ACTION
UNIT DOES NOT OPERATE
OFF
OFF
Check mains supply - external fuses - isolator
OFF
ON
Check unit ON/OFF.
OFF
Check thermostat is calling for heating or cooling. Wait 6 minutes, fan and compressor should run. If not,
OFF check any external equipment in Interlock circuit is not preventing the machine from starting. Check internal
control fuses.
ON Check water and air flows are not restricted.
ON Check thermal cut out on Soft Start if fitted.
Check flow rate is adequate. Check Chill limit cut out switch and reset. Check water pump etc. to restore
OFF
water flow through machine.
FAN ON COMPRESSOR OFF
ON Unit on defrost (heating mode) check air temperature is not below 7°C.
(-15ºC for a BMCY). Check chill limit cut out switch and reset.
OFF
ON Unit off on chill limit (cooling mode).
UNIT OPERATES INTERMITTENTLY
ON Check water and air flows are not restricted
ON/OFF
and that electrical supply is adequate.
OFF
Errors associated with the digital thermostat
LAMP ON
Probe interrupted, short circuit or outside range.
Internal EEPROM memory error.
ACTION
Check connection between probes and
thermostat.
Switch off heat pump at mains supply for five
minutes then switch back on. If fault persists
contact installer.
SD638152 ISSUE 4