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 the Dantherm Group UK Service
Department.
Tel44(0)1621 856 611
8.1 USER CHECK LIST
Errors associated with the digital thermostat
LAMP
ACTION
UNIT DOES NOT OPERATE
MAINS
RED
OFF
Check mains supply - external fuses - isolator
FAULT
AMBER
OFF
DEFROST/
CHILL LIMIT
CLEAR
OFF
MAINS
RED
ON
Check unit ON/OFF.
FAULT
AMBER
OFF
DEFROST/
CHILL LIMIT
CLEAR
OFF
Check thermostat is calling for heating or cooling. Wait 6 minutes, fan and compressor should run. If not,
check any external equipment in Interlock circuit is not preventing the machine from starting. Check internal
control fuses.
MAINS
RED
ON
Check water and air flows are not restricted.
FAULT
AMBER
ON
Check thermal cut out on Soft Start if fitted.
DEFROST/
CHILL LIMIT
CLEAR
OFF
Check flow rate is adequate. Check Chill limit cut out switch and reset. Check water pump etc. to restore
water flow through machine.
LAMP
FAN ON COMPRESSOR OFF
MAINS
RED
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.
FAULT
AMBER
OFF
DEFROST/
CHILL LIMIT
CLEAR
ON
Unit off on chill limit (cooling mode).
LAMP
UNIT OPERATES INTERMITTENTLY
MAINS
RED
ON
Check water and air flows are not restricted
FAULT
AMBER
ON/OFF
and that electrical supply is adequate.
DEFROST/
CHILL LIMIT
CLEAR
OFF
SYMBOL
DESCRIPTION
LAMP ON
ACTION
E1-E1/E2-E2
Probe error
Probe interrupted, short circuit 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.
20
SD638152 ISSUE 4
PPT16/22 BHC & PPT16BMCY OWNER INSTALLATION MANUAL
