Troubleshooting; General Guidelines; General Symptoms; Technical Specifications - Daikin EKHWS050B3VJU Manuel D'installation

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 supply panel or on
the switch box of the unit, always make sure that the circuit
breaker 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 cannot be
found, call your local dealer

General symptoms

Symptom 1: No water flow from hot taps
P
OSSIBLE CAUSES
The main water supply is off.
Symptom 2: Water from hot taps is cold
P
OSSIBLE CAUSES
The thermal cut-out(s) has/have
operated.
The indoor unit (EKHBX) is not
operating.
Symptom 3: Intermittent water discharge
P
OSSIBLE CAUSES
Thermal control failure (water will be
hot).
The expansion vessel is broken.
EKHWS050+080B3VJU
Domestic hot water tank for air to water heat pump system
4PW56114-1
C
ORRECTIVE ACTION
Check that all shut off valves of the
water circuit are completely open.
C
ORRECTIVE ACTION
• Check and reset button(s).
• Check if thermistor is correctly
installed in thermistor socket.
Check the indoor unit (EKHBX)
operation. Refer to the manual
delivered with the indoor unit.
If any faults are suspected, contact
your local dealer.
C
ORRECTIVE ACTION
Switch off power to the indoor unit.
When discharge has stopped, check
the thermal controls and replace if
faulty.
Contact your local dealer.
Replace the expansion vessel.
T
ECHNICAL SPECIFICATIONS
Domestic hot water tank specifications
Volume
Internal heat exchanger volume
Overall dimensions (Ø x H)
Booster heater, power supply
Minimum circuit amps (MCA)
Maximum overcurrent protect (MOP)
Booster heater, capacity
Connections
Weight (empty)
Mounting
(a) FBSP = Female British Standard Pipe
EKHWS050 EKHWS080
(gal.) 50 80
(l) 200 300
(gal.) 0.8
(l) 3
(inch) 22.8 x 45.3 22.8 x 63.0
(mm) 580 x 1150 580 x 1600
208/230 V 2~ 60 Hz
14.3 A
20 A
3 kW
(a)
3/4" FBSP
(lbs) 99.2 130.1
(kg) 45 59
Floor
Installation manual
9