Estia HWS-1501CSHM3-E Manuel D'installation page 10

AIR TO WATER HEAT PUMP SYSTEM
10.0 FAULT FINDING
The table below lists some common faults, their possible causes and their remedy. Any
servicing of the water cylinder and Air to Water Heat Pump system must be carried out
by a trained competent installer.
FAULT POSSIBLE CAUSE
No hot 1. Mains water supply off
water flow
2. Mains water filter
3. Inlet water control valves
1. Controller on Heat Pump Hydro
Water from hot
taps is cold
2. Heat Pump not working
3. Faulty water cylinder temperature
Water from hot
1. Cylinder heater thermal cut-out
taps is only
warm
2. Faulty water cylinder temperature
Water from hot
1. Water storage temperature on
taps is too hot
2. Faulty water cylinder temperature
Water discharges
1. Mains water pressure too high
from Pressure
Relief Valve
continually
2. Pressure Relief Valve seat is
(if fitted) blocked
incorrectly fitted
Unit set to Space Heating only
sensor
has operated
sensor
Heat Pump Controller is set too
high
sensor
damaged
INSTALLATION AND SERVICE MANUAL
REMEDY
1. Check and turn on mains water
supply
2. Turn off water supply. Remove
filter and clean in accordance with
manufacturers instructions
3. Check and refit as required
1. Check setting
2. Check operation of Heat Pump.
If a fault is suspected consult the
Heat Pump Manual
3. Check sensor operation.
Replace if necessary
1. Check. Reset by pushing button on
cut-out
2. Check sensor operation. Replace if
necessary
1. Check and adjust as required
2. Check sensor operation.
Replace if necessary
1. Refer to section Important
Installation Points for correct
pressure. If necessary
fit a Pressure Reducing Valve
to inlet water supply
2. Remove and replace
EN
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