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1 Troubleshooting
Service manual
23
EBLQ+EDLQ011~W1 + EBLQ+EDLQ011~0W1
+ EK(2)CB EKMB9W1
Daikin Altherma – Monobloc
ESIE18-04 – 2019.02
1.5
Symptom based troubleshooting
1.5.1
Incorrect energy metering read-out
Root cause category: hardware
Possible failure
Root cause
Check
Repair
kWh values measured with field
supplied meters show different
values as the user interface.
Backup heater wiring is NOT
correct.
Check backup heater wiring, see
the installer reference guide.
Adjust wiring if required.
Values on user interface are
incorrect, show strange values.
User interface is replaced or reset
to factory settings; Previous
measurements are lost.
Check if user interface is replaced
or reset.
Reset measurements of field
supplied electrical meters and
reset user interface and hydro
PCB to factory settings.
Values on user interface are
incorrect, show strange values.
Hydro PCB is replaced or reset to
factory settings; Previous settings
are lost.
Check if hydro PCB is replaced or
reset.
Reset measurements of field
supplied electrical meters and
reset user interface and hydro
PCB to factory settings.
Unit operates in emergency mode. Backup heater is allowed in
emergency mode, setting [4‑00].
Check setting.
If you do NOT want the backup
heater to run automatically in
emergency mode, adjust setting.
1.5.2
Water pump related
Increased water pump sound level
Root cause category: installation
Possible failure
Root cause
Check
Repair
Water filter blocked.
Dirty water.
▪ Check water filter,
▪ Check water quality.
Clean the water filter.
Air in the water circuit.
NOT enough air purged.
▪ Check if all air purge valves are
open,
▪ Check if air purge valves are
installed on all highest points of
the field installed water circuit.
Purge air out of the unit and field
supplied water system and backup
heater.
Water pressure too low.
▪ Water pressure NOT checked
during filling,
▪ Air was purged from the water
circuit after filling,
▪ Leakage.
Check water pressure.
Adjust water pressure if required
(±2 bar).
Water circuit partially blocked.
Obstruction in the water circuit.
Check water circuit for blockages.
Remove possible blockages and
check the water quality.
Root cause category: component – mechanical
Possible failure
Root cause
Check
Repair
Water pump mechanical problem.
Internal pump friction.
Check water pump.
Replace water pump.
Air purge blocked - air trapped in
water circuit.
Component failure.
Check air purge valve.
Replace air purge valve.