08 + ERLQ004~008
Daikin Altherma - Low Temperature Split
4P313774-1 – 2012.05
Installer reference guide
68
12 Troubleshooting
11.2.1 Opening the indoor unit
See "7.1.3 To open the switch box cover of the indoor unit" on
page 27.
11.3
Checklist for yearly maintenance for indoor
unit
Check the following at least once a year:
Q
Water pressure
Q
Water filter
Q
Water pressure relief valve
Q
Pressure relief valve of the domestic hot water tank
Q
Switch box
Q
Booster heater of the domestic hot water tank
Water pressure
Check whether the water pressure is above 1 bar. If it is lower, add
water.
Water filter
Clean the water filter.
Water pressure relief valve
Open the valve and check the correct operation.
Water may be very
hot!
Checkpoints are:
Q
Water flow coming from the relief valve is high enough, no
blockage of the valve or in between piping is suspected.
Q
Water coming out from the relief valve and contains debris or
dirt:
Q
open the valve untill the discharged water does not contain
dirt anymore
Q
flush the system and install an additional water filter (a
magnectic cyclone filter is preferably).
To make sure this water originates from the tank, check after a tank
heat up cycle.
It is recommended to do this maintenance more frequently.
Relief valve of the domestic hot water tank (field supply)
Open the valve and check the correct operation.
Water may be very
hot!
Checkpoints are:
Q
Water flow coming from the relief valve is high enough, no
blockage of the valve or in between piping is suspected.
Q
Water coming out from the relief valve and contains debris or
dirt:
Q
open the valve untill the discharged water does not contain
dirt anymore
Q
flush and clean the complete tank including the piping
between the relief valve and cold water inlet.
To make sure this water originates from the tank, check after a tank
heat up cycle.
It is recommended to do this maintenance more frequently.
Switch box
Q
Carry out a thorough visual inspection of the switch box and look
for obvious defects such as loose connections or defective
wiring.
Q
Using an ohmmeter, check for correct operation of contactors
K1M, K2M, K3M and K5M (depending on your installation). All
contacts of these contactors must be in open position when the
power is turned OFF.
Booster heater of the domestic hot 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
domestic hot water tank, remove the booster heater from the
domestic hot water tank and immerse in a bucket (or similar) with
lime-removing product for 24 hours.
12
Troubleshooting
12.1
Overview: Troubleshooting
12.2
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.
NOTICE
Handle the water filter with care. Do NOT use excessive
force when you reinsert the water filter so as NOT to
damage the water filter mesh.
1
3
2
5
4
WARNING
If the internal wiring is damaged, it has to be replaced by
the manufacturer, its service agent or similarly qualified
persons.
INFORMATION
Only for wall-mounted units equipped with a domestic hot
water tank with a built-in electrical booster heater (EKHW*).
WARNING
Q
When carrying out an inspection on the switch box of
the unit, always make sure that the unit is
disconnected from the mains. Turn off the respective
circuit breaker.
Q
When a safety device was activated, stop the unit and
find out why the safety device was activated before
resetting it. NEVER bridge safety devices or change
their values to a value other than the factory default
setting. If you are unable to find the cause of the
problem, call your dealer.
DANGER: RISK OF ELECTROCUTION
WARNING
Prevent hazard due to the inadvertent resetting of the
thermal cut-out: this appliance must NOT be supplied
through an external switching device, such as a timer, or
connected to a circuit that is regularly turned ON and OFF
by the utility.
DANGER: RISK OF BURNING
