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Symptom 4: The water pressure relief valve leaks
P
OSSIBLE CAUSES
Cold water inlet pressure.
The field installed pressure relief
valve is not functioning properly.
Dirt is blocking the water pressure
relief valve outlet.
Symptom 5: Dirty water
P
OSSIBLE CAUSES
Dirty water
Symptom 6: The user interface displays "
certain buttons
P
OSSIBLE CAUSES
The current permission level is set to
a level that prevents using the
pressed button.
Symptom 7: No water flow from hot taps
P
OSSIBLE CAUSES
The main water supply is off.
The strainer is blocked (eg. stainer of
hot water tap).
The field installed cold water inlet
pressure reducing valve is not fitted
properly.
Symptom 8: Water from hot taps is cold
P
OSSIBLE CAUSES
The thermal cut-out located in the
domestic hot water tank module has
operated
The heat pump is not operating.
Symptom 9: Intermittent water discharge
P
OSSIBLE CAUSES
Thermal control failure (water will be
hot).
The field installed expansion vessel
is broken.
Installation manual
26
C
ORRECTIVE ACTION
Check the pressure reducing valve.
Check for correct operation of the
pressure relief valve by turning the
red knob on the valve counter
clockwise:
• If you do not hear a clacking sound,
contact your local dealer.
• In case the water keeps running out
of the unit, close both the water inlet
and outlet shut-off valves first and
then contact your local dealer.
Check for correct operation of the
pressure relief valve by turning the
red knob on the valve counter
clockwise:
• If you do not hear a clacking sound,
contact your local dealer.
• In case the water keeps running out
of the unit, close both the water inlet
and outlet shut-off valves first and
then contact your local dealer.
C
ORRECTIVE ACTION
Flush or clean the domestic hot
water tank after periods of standstill.
It could occur that particles in the
water deposit on the bottom of the
tank. If this deposit layer becomes
thick enough it could enter the hot
water outlet and contaminate the hot
water.
n
" when pressing
C
ORRECTIVE ACTION
Change the "user permission level"
field setting [0-00], see "Field
settings" in the operation manual.
C
ORRECTIVE ACTION
Check that all shut off valves of the
water circuit are completely open.
Turn off the water supply, remove
and clean the strainer.
Check and refit as required.
C
ORRECTIVE ACTION
• Check and find the cause of tripping
and then reset button.
• Check if the thermistor is correctly
installed in the thermistor socket of
the heat pump module.
Procedure: remove front panel and
insulation, replace or fix the sensor.
Check the heat pump module
operation. Refer to the manual
delivered with the unit.
If any faults are suspected, contact
your local dealer.
C
ORRECTIVE ACTION
Contact your local dealer.
Replace the expansion vessel.
13.4. Error codes
When a safety device is activated, the user interface LED will be
flashing, and an error code will be displayed.
A list of all errors and corrective actions can be found in the table
below.
Reset the safety by pushing the Y button.
In case this procedure for resetting the safety is not successful,
contact your local dealer.
Error
code
Failure cause
Inlet water temperature
80
thermistor failure (inlet water
thermistor broken)
Outlet water temperature
81
thermistor failure (outlet water
temperature sensor broken)
Scale accumulating error
7E
Flow failure (water flow too low
7H
or no water flow at all, minimum
required water flow is 1 l/min)
PCB defective (A1P)
A1
Too high refrigerant temperature
A5
(measured by R4T)
Booster heater thermal protector
AC
is open
Heat exchanger thermistor
C4
failure (heat exchanger
temperature sensor broken)
PCB defective (A3P, A4P)
E1
Overload activation of
E5
compressor
Compressor start up error
E6
Fan lock failure (fan is locked)
E7
Too high input current error
E8
Domestic hot water temperature
EC
too high (>80°C)
Too high discharge temperature
F3
Compressor system sensor
H0
abnormality
Position sensor abnormality
H6
Corrective action
Contact your local dealer.
Contact your local dealer.
This is a first indication that
descaling the unit will be
required. The unit however will
continue to provide hot water.
Contact your local dealer.
• Check that the unit is operating
within its operating range (refer
to
"Disposal requirements" on
page
27).
• Also refer to
"Charging water" on
page
11.
• Make sure there is no air in the
system (purge air).
• Check on the manometer that
there is sufficient water pressure.
The water pressure must be
>1 bar (water is cold).
• Make sure that the expansion
vessel is not broken.
• Check that the pump fuse (FU2)
and PCB fuse (FU1) are not
blown.
• Descale the system.
Contact your local dealer.
• Check if pump speed selection is
at position III.
Contact your local dealer.
Contact your local dealer.
Reset the thermal protector
(refer to
5.2. "Overview of the
domestic hot water tank module"
on page 4
for the location of the
thermal protector).
Contact your local dealer.
Contact your local dealer.
Check that the unit is operating
within its operating range (refer
to
"Disposal requirements" on
page
27).
Contact your local dealer.
Check that the unit is operating
within its operating range (refer
to
"Disposal requirements" on
page
27).
Contact your local dealer.
Check if the fan is not obstructed
by dirt. If the fan is not
obstructed, contact your local
dealer.
Contact your local dealer.
• Check that the contactor of the
electric booster heater is not
short circuited.
• Check that the domestic hot
water thermistor is giving the
correct read out.
Contact your local dealer.
Contact your local dealer.
Contact your local dealer.
EKHVWQ002AAV3 + EKHHS200+260AA1V3
Domestic hot water heat pump
4PW65342-1A – 10.2010
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