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M
AINTENANCE AND SERVICE
In order to ensure optimal availability of the unit, a number of checks
and inspections on the unit and the field wiring have to be carried out
at regular intervals.
This maintenance should be carried out by your local Daikin
technician.
To
execute
the
maintenance
activities as mentioned below, it
is only required to remove the
front decoration panel.
To take away the front decoration
panel, remove the 2 bottom
screws and then unhitch the
panel.
Maintenance activities
WARNING: ELECTRIC SHOCK
Before carrying out any maintenance or repair activity,
always switch off the circuit breaker on the supply
panel, remove the fuses or open the protection
devices of the unit.
Make sure that before starting any maintenance or
repair activity, also the power supply to the outdoor
unit is switched off.
Do not touch live parts for 10 minutes after the power
supply is turned off because of high voltage risk.
Additionally, measure the points as shown in
with a tester and confirm that the voltage of the
capacitor in the main circuit is no more than 50 V DC.
The heater of the compressor may operate even in
stop mode.
Please note that some sections of the electric
component box are hot.
Make sure you do not touch a conductive section.
Do not rinse the indoor unit. This may cause electric
shocks or fire.
Play it safe!
Touch a metal part by hand (such as the stop valve) in
order to eliminate static electricity and to protect the PCB
before performing service.
The described checks must be executed at least once a year by
qualified personnel.
1
Water pressure relief 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.
2
Pressure relief valve hose
Check that the pressure relief valve hose is positioned
appropriately to drain the water.
3
Indoor unit switch box
Carry out a thorough visual inspection of the switch box and look
for obvious defects such as loose connections or defective
wiring.
Installation manual
31
2x
figure 5
4
Water pressure
Check if the water pressure is above 1 bar.
If necessary add water.
5
Water filter
Clean the water filter.
T
ROUBLESHOOTING
This section provides useful information for diagnosing and
correcting certain troubles which may occur in the unit.
This troubleshooting and related corrective actions may only be
carried out by your local Daikin technician.
General guidelines
Before starting the troubleshooting procedure, carry out a thorough
visual inspection of the unit and look for obvious defects such as
loose connections or defective wiring.
When carrying out an inspection on the switch box of the
unit, always make sure that the main switch of the unit is
switched off.
When a safety device was activated, stop the unit and find out why
the safety device was activated before resetting it. Under no
circumstances safety devices may be bridged or changed to a value
other than the factory setting. If the cause of the problem can not be
found, call your local dealer
.
If the pressure relief valve is not working correctly and is to be
replaced, always reconnect the flexible hose attached to the pressure
relief valve, to avoid water dripping out of the unit!
Opening the unit
To facilitate access to the air
purge valve, thermal cut-out,
3-way
valve,
thermistors,
field wiring duct, ..., the top
decoration panel of the unit
can
be
removed
removing the 2 screws at the
rear and then unhitch the
panel.
In
combination
removing the top decoration
panel, the front decoration
panel can also be removed
to
allow
servicing
manometer, pressure relief
valve, ... To remove the front
decoration panel, remove
the 2 bottom screws and
then unhitch the panel.
2x
by
4x
with
the
2x
EKHBRD011~016AAV1+Y1
Indoor unit for air to water heat pump system
4PW54465-1A
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