8.0 HEAT PUMP MALFUNCTION
USER CHECK LIST 30/45/70BM
LAMP
ACTION
UNIT DOES NOT OPERATE
MAINS
RED
OFF
Check mains supply, – external fuses – isolator etc.
FAULT
AMBER
OFF
DEFROST
WHITE
OFF
WATER FLOW
GREEN
OFF
MAINS
RED
ON
Water flow inadequate.
FAULT
AMBER
OFF
Check water pump to restore water flow through machine. Check
waterflow rate. Check internal control MCB
DEFROST
WHITE
OFF
Check thermostat set point.
WATER FLOW
GREEN
OFF
MAINS
RED
ON
12 hour timer timing out or standby switch set to 0
FAULT
AMBER
OFF
DEFROST
WHITE
OFF
WATERFLOW
GREEN
ON
MAINS
RED
ON
Check air flows are not restricted.
FAULT
AMBER
ON
Check thermal cut out on Soft Start if fitted.
DEFROST
WHITE
OFF
Check HP/LP cutout switch and reset (red button below console
thermostat). NOTE LP Switch is Auto reset on Y machines. Check Fan
and compressor overloads (Fan located in electric box)
WATERFLOW
GREEN
ON
FAN ON COMPRESSOR OFF
MAINS
RED
ON
Unit on defrost (normal) if after 20 mins the defrost lamp is still on check
that air temperature is not below 10ºC for 'M' models (-15ºC for 'MY'
models).
FAULT
AMBER
OFF
DEFROST
WHITE
ON
Check evaporator is clean
WATERFLOW
GREEN
ON
Check 12 hours elapsed since first power up.
UNIT OPERATES INTERMITTENTLY
MAINS
RED
ON
Check water flow is not restricted,
FAULT
AMBER
ON/OFF
and that electrical supply is adequate.
DEFROST
WHITE
OFF
Check that linked in external equipment is not the cause of the fault.
WATERFLOW
GREEN
ON/OFF
WARNING: Isolate machine electrically before entering machine 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.
Only a competent electrician should attempt to rectify electrical supply
problems.
The refrigeration circuit can only be worked on by an authorised/competent
technician in accordance with EU 517/2014.
Any sign of abnormal operation such as water dripping should be reported
immediately to your installer or to Dantherm Group UK.
If in doubt or if advice required, contact Dantherm Group UK Service
Department.
Tel44 (0)1621 856611
30
SD566252 ISSUE 51
PR0-PAC SYSTEM OWNER INSTALLATION MANUAL
