E(D/B)(H/L)Q011~016BB
Unit for air to water heat pump system
4PW67904-1 – 01.2011
Installation manual
52
Symptom 4: The water pressure relief valve opens
Symptom 5: The water pressure relief valve leaks
Symptom 6: The user interface displays "
n
n
n
n
" when
pressing certain buttons
Symptom 7: Space heating capacity shortage at low outdoor
temperatures
Symptom 8: [4-03] and maximum tank set point is not according
to the the applicable tank
1.
In case of domstic hot water tank with built-in electrical booster
heater (EKHW*) and [4-03]=5 or maximum domestic hot water
set point is 60°C, the wrong field setting and logic is activated
according to the applicable tank.
2.
In case of domestic hot water tank without booster heater
(EKHTS) and [4-03]
≠
5 or maximum domestic hot water set point
is 78°C, the wrong field setting and logic is activated according
to the applicable tank.
Symptom 9: Temperature values displayed on the remote
controller (user interface) are displayed in °F instead of °C
P
OSSIBLE
CAUSES
C
ORRECTIVE
ACTION
The expansion vessel is broken.
Replace the expansion vessel.
The water volume in the installation
is too high.
Make sure that the water volume in
the installation is under the
maximum allowed value (refer to
"Checking the water volume and
expansion vessel pre-pressure" on
page 17
).
P
OSSIBLE
CAUSES
C
ORRECTIVE
ACTION
Dirt is blocking the water pressure
relief valve outlet.
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.
P
OSSIBLE
CAUSES
C
ORRECTIVE
ACTION
The current permission level is set to
a level that prevents using the
pressed button.
Change the "user permission level"
field setting [0-00], see
"10.10. Field
settings" on page 32
.
P
OSSIBLE
CAUSES
C
ORRECTIVE
ACTION
Backup heater operation is not
activated.
Check that the "backup heater
operation status" field setting [4-00]
is turned on, see
"10.10. Field
settings" on page 32
.
Check whether or not the thermal
protector of the backup heater has
been activated (refer to
Main
components
,
"16. Backup heater
thermal protector" on page 11
for
location of the reset button).
Check if booster heater and backup
heater are configured to operate
simultaneously (field setting [4-01],
see
"10.10. Field settings" on
page 32
).
Check whether or not the thermal
fuse of the backup heater is blown
(refer to
"Main components"
,
"17. Backup heater thermal fuse" on
page 11
for location of the reset
button).
The backup heater equilibrium
temperature has not been
configured correctly.
Raise the 'equilibrium temperature'
field setting [5-01] to activate backup
heater operation at a higher outdoor
temperature.
Too much heat pump capacity is
used for heating domestic hot water
(applies only to installations with a
domestic hot water tank).
Check that the 'space heating priority
temperature' field settings are
configured appropriately:
• Make sure that the 'space heating
priority status' field setting [5-02] is
enabled.
• Raise the 'space heating priority
temperature' field setting [5-03] to
activate booster heater operation
at a higher outdoor temperature.
P
OSSIBLE
CAUSES
C
ORRECTIVE
ACTION
At the time of setting DIP switch
SS2-2, wrong field wiring caused
wrong detection of tank type.
Check all field wiring between unit
and tank switch box.
Reset procedure
• Power off the unit and put SS-2 to
OFF.
• Power on the unit, it means that
the unit will detect no domestic hot
water tank.
• Power off the unit and put SS2-2
to ON again.
• Power on the unit and the unit will
detect again the type of tank: tank
with built-in electrical booster
heater (EKHW*)([4-03] default
value will be 3), or tank without
electrical booster heater
(EKHTS)([4-03] default value will
be 5).
P
OSSIBLE
CAUSES
C
ORRECTIVE
ACTIONS
You accidentally changed the setting
to view the temperature values in °F
by pushing the
ib
and
jb
buttons simultaneously.
To change the display back to °C,
push
ib
and
jb
buttons
simultaneously for 5 seconds.
Execute same procedure to change
back to the °F display. The default
temperature display is in °C.
