Panasonic AQUAREA WH-ADC0912K6E5AN Service Manual page 78

12.2.8.1 Check Water Flow of Water
Circuit
Confirm the maximum water flow during main pump
operation not less than 15 l/min.
* Water flow can be check through service setup
(Pump Max Speed)
[Heating operation at low water temperature with
lower water flow may trigger "H75" during defrost
process.]
12.2.8.2 Reset Overload Protector ⑫
Overload Protector ⑫ a serves the safety purpose to
prevent the water over heating. When the Overload
Protector ⑫ a trip at high water temperature, take
below steps to reset it.
1. Take out the cover.
2. Use a test pen to push the centre button gently in
order to reset the Overload Protector ⑫.
3. Fix the cover to the original fixing condition.
12.2.9 Maintenance

In order to ensure safety and optimal performance
of the Tank Unit, seasonal inspections on the
Tank Unit, functional check of RCCB/ELCB, field
wiring and piping have to be carried out at regular
intervals. This maintenance should be carried out
by authorized dealer. Contact dealer for
scheduled inspection.
12.2.9.1 Maintenance for Magnetic
Water Filter Set ⑨
1. Turn OFF power supply.
2. Place a container below Magnetic Water Filter Set
⑨.
3. Turn to remove the Magnet Bar at bottom of
Magnetic Water Filter Set ⑨.
4. By using Allen key (8mm), remove the Cap of
Discharge Port.
5. By using Allen Key (4mm), open the Service Valve
to release the dirty water from the Discharge Port
into a container. Close the service valve when the
container is full to avoid spillage in the tank unit.
Dispose the dirty water.
6. Reinstall the Cap of Discharge Port and Magnet
Bar.
7. Re-charging the water to Space Heating / Cooling
circuit if necessary (refer Section 12.2.5 for
details.)
8. Turn ON power supply.
Use test pen to push
this button for reset
Overload protector ⑫.
Open
12.2.9.2 Maintenance for Safety Relief
Valve

It is strongly recommended to operate the valve
by turn the knob counter clockwise to ensure free
water flow through discharge pipe at regular
intervals to ensure it is not blocked and to remove
lime deposit.
Stagnant water in Tank Unit should be drained if it is not going
to be operated for more than 60 days.
12.2.9.3 Proper Pump Down Procedure
Strictly follow the steps below for proper pump down procedure.
Explosion may occur if the steps are not followed as per
sequence.
1. When the Tank Unit is not in operation (standby), enter the
Service setup menu in the Remote Controller and select
Pump down operation to turn it ON. (See APPENDIX for
detail)
2. After 10~15 minutes, (after 1 or 2 minutes in case very low
ambient temperatures (< 10°C)), fully close 2 way valve on
Outdoor Unit.
3. After 3 minutes, fully close 3 way valve on Outdoor Unit.
4. Press the "OFF/ON" switch on the Remote Controller ①
to stop pump down operation.
5. Remove the refrigerant piping.
12.2.9.4 Installation of Ventilation Unit
on top of Tank Unit (Optional)

For installation works of Ventilation Unit on top of
Tank Unit, refer to the Ventilation Unit Installation
Manual.
Before install Ventilation Unit, fix the Feet that provided by
Ventilation Unit to the half punch holes on Top Panel of Tank Unit,
Otherwise, heavy Ventilation Unit may fall and cause injury.
Half punch holes
78
Service
Valve
Discharge port
Magnet Bar
Close
25
WARNING
CAUTION
Feet (4 pieces)
- provided by Ventilation Unit