Daikin Altherma EKHBH Series Service Manual page 156

Maintenance
1.2 Maintenance
1
Introduction
Precaution
Overview
3
5 5
5–4
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.
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.
The described checks must be executed at least once a year.
1 Water pressure
Check if the water pressure is above 0.3 bar. If necessary add water.
2 Water filter
Clean the water filter.
3 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 Daikin 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 Daikin dealer.
4 Sanitary water tank pressure relief valve (field supply)
Applies only to installations with a sanitary water tank.
Check for correct operation of the pressure relief valve on the sanitary water tank.
5 Sanitary water tank booster heater
Applies only to installations with a sanitary water tank.
It is advisable to remove lime buildup on the booster heater to extend its life span, especially in
regions with hard water. To do so, drain the sanitary water tank, remove the booster heater from
the sanitary water tank and immerse in a bucket (or similar) with lime-removing product for
24 hours.
6 Hydro-box switch box
Carry out a thorough visual inspection of the switch box and look for obvious defects such as
loose connections or defective wiring.
Check for correct operation of contactors K1M, K2M, K3M (appilcations with sanitary water tank
only) and K4M by use of an ohmmeter. All contacts of these contactors must be in open position.
Part 5 – Disassembly and Maintenance
ESIE06-03