User Interface Is Failure Or Frozen Screen; Leak; Water Flow Or Volume Too Low; Compressor Related - Daikin Altherma EBLQ011CAV3 Service Manual

1.5.4

User interface is failure or frozen screen

Root cause category: component – electrical
Possible failure
Hydro PCB NOT operational.
Reactor coil broken.
P1/P2 transmission cable broken/
short-circuit.
User interface failure.
No display.
Blocked screen.
1.5.5

Leak

Root cause category: installation
Possible failure
Drain connection of water safety
valve leaking.
Drain of bottom drain plate NOT
well connected.
Leakage of drain valve.
Root cause category: component – mechanical
Possible failure
Expansion vessel NOT
pressurized.
Safety valve blocked.
Safety valve leaking.
Leakage of drain valve.
Domestic hot water tank leakage.
Air Purge leakage.
1.5.6

Water flow or volume too low

1 If this symptom is determined, check the steps in error codes
7H‑xx to solve the
troubleshooting" on page 4.
1.5.7

Compressor related

Compressor does not start
Root cause category: software control
Possible failure
Compressor does NOT start
because water loop temperature is
too low.
EBLQ+EDLQ011~016CAV3+W1 + EBLQ+EDLQ011~016CA3V3+W1
+ EK(2)CB07CAV3 + EKMBUHCA3V3+9W1
Daikin Altherma – Monobloc
ESIE18-04 – 2019.02
Root cause
▪ No power supply,
▪ Faulty transformer,
▪ PCB malfunction.
Component problem.
Display contrast too high or too
low.
Mismatch between software and
EEPROM on user interface.
Root cause
Bad connection between unit drain
pipe and field drain pipe.
Bad connection of bottom drain
plate and field drain connection.
Valve NOT completely closed.
Root cause
Component failure.
Component failure.
Component failure.
Component failure.
Component failure.
Component failure.
error. See "1.4 Error based
Root cause
Special software control activated -
Water loop temperature is too low
(<24°C) causing ONLY the backup
heater to operate. Compressor will
start when water temperature
reaches 24°C or more.
Check
▪ Confirm if a small green led is
blinking in regular intervals,
▪ Confirm power supply towards
hydro PCB,
▪ Check good operation
transformer.
Check continuity of the reactor coil. Replace the reactor coil in case
Check P1/P2 cable (16 V DC on
BRC terminals and cable
continuity).
Check
Check the drain connection of the
water safety valve.
Check the drain connection
between the bottom drain plate
and the field drain.
Check if drain valve is closed.
Check
Check expansion vessel.
Check safety valve.
Check safety valve.
Check drain valve.
Check tank visually for leakages.
Check air purge valve for
leakages.
Check
Normal unit operation – no specific
countermeasure required.
1 Troubleshooting
Repair
▪ Re-establish power to hydro
PCB,
▪ Replace hydro PCB in case
power supply and transformer
are OK but led is NOT blinking.
of
faulty.
Repair P1/P2 cable if required.
Replace user interface.
Adjust contrast.
Power reset and user interface
reset.
Repair
Correct the drain connection if
required.
Correct the drain connection if
required.
Close the drain valve.
Repair
Replace expansion vessel.
Replace safety valve.
Replace safety valve.
Replace drain valve.
Repair leakages. If NOT possible,
complete unit has to be replaced.
Replace air purge valve.
Repair
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Service manual
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