Daikin EKHTS200A, Installation Manual

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E260A + EK260AA
Domestic hot water tank for air to water heat pump system
4PW53247-1B
Installation manual
7
3 Only for domestic hot water tanks with a service opening
(EKHTSP):
For cleaning of the hot water tank interior and the heat
exchanger, remove front decoration panels and insulation piece,
drain the domestic hot water tank and remove the service cover
with a socket spanner of 32 mm, like indicated in the figure
below.
Descaling
Depending on the water quality and set temperature, scale
candeposit on the heat exchanger inside the domestic hot water tank
and can restrict heat transfer. For this reason, descaling of the heat
exchanger may be required at certain intervals.
Draining
Follow the next steps to drain the domestic hot water tank:
1 Switch off the power supply.
2 Turn off the cold water supply valve.
3 Open the hot water taps.
4 Open the drain valve.
T
ROUBLESHOOTING
This section provides useful information for diagnosing and
correcting certain troubles which may occur in the unit.
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 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 cannot be
found, call your local dealer.
General symptoms
Symptom 1: No water flow from hot taps
Symptom 2: Water from hot taps is cold
Symptom 3: Intermittent water discharge
D
ISPOSAL REQUIREMENTS
Dismantling of the unit and treatment of parts must be done in
accordance with relevant local and national legislation.
1 Front decoration panels
2 Insulation piece
3 Service cover
When using means for descaling, it must be ensured that
the water quality remains compliant with the requirements
of EU directive 98/83/EC.
1 2 3
2x
2x
2x
When carrying out an inspection on the supply panel or on
the switch box of the unit, always make sure that the circuit
breaker of the unit is switched off.
P
OSSIBLE CAUSES
C
ORRECTIVE ACTION
The main water supply is off. Check that all shut off valves of the
water circuit are completely open.
P
OSSIBLE CAUSES
C
ORRECTIVE ACTION
The thermal cut-out located in the
indoor unit has operated • Check and find the cause of tripping
and then reset button.
• Check if thermistor is correctly
installed in thermistor socket.
Procedure: remove front panel and
insulation, replace or fix the sensor.
The indoor unit (EKHBRD) is not
operating. Check the indoor unit operation.
Refer to the manual delivered with
the indoor unit.
If any faults are suspected, contact
your local dealer.
P
OSSIBLE CAUSES
C
ORRECTIVE ACTION
Thermal control failure (water will be
hot). Contact your local dealer.
The expansion vessel is broken. Replace the expansion vessel.