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Troubleshooting
Service manual
83
EBLA04~08E + EDLA04~08E
Daikin Altherma 3 M
ESIE22-09 – 2022.05
3.4.4 Symptom: User interface is failure or frozen screen
Root cause category: component – electrical
Possible failure
Root cause
Check
Repair
Hydro PCB NOT
operational.
▪
No power supply,
▪
Faulty transformer,
▪
PCB malfunction.
▪
Confirm if a small green
led is blinking in regular
intervals,
▪
Confirm power supply
towards hydro PCB,
▪
Check good operation of
transformer.
▪
Re-establish power to
hydro PCB,
▪
Replace hydro PCB in
case power supply and
transformer are OK but
led is NOT blinking.
Reactor coil broken.
Component problem.
Check continuity of the
reactor coil.
Replace the reactor coil in
case faulty.
P1/P2 transmission cable
broken/short-circuit.
Check P1/P2 cable
(16 V DC on BRC terminals
and cable continuity).
Repair P1/P2 cable if
required.
User interface failure.
Check user interface
software version.
Update user interface
software to the latest
version. If problem
persists, replace the user
interface.
No display.
Display contrast too high or
too low.
Adjust contrast.
Blocked screen.
Mismatch between
software and EEPROM on
user interface.
Power reset and user
interface reset.
3.4.5 Symptom: Leak
Root cause category: installation
Possible failure
Root cause
Check
Repair
Drain connection of water
safety valve leaking.
Bad connection between
unit drain pipe and field
drain pipe.
Check the drain connection
of the water safety valve.
Correct the drain
connection if required.
Drain of bottom drain plate
NOT well connected.
Bad connection of bottom
drain plate and field drain
connection.
Check the drain connection
between the bottom drain
plate and the field drain.
Correct the drain
connection if required.
Leakage of drain valve.
Valve NOT completely
closed.
Check if drain valve is
closed.
Close the drain valve.
Root cause category: component – mechanical
Possible failure
Root cause
Check
Repair
Expansion vessel NOT
pressurized.
Component failure.
Check expansion vessel.
Replace expansion vessel.
Safety valve blocked.
Component failure.
Check safety valve.
Replace safety valve.
Safety valve leaking.
Component failure.
Check safety valve.
Replace safety valve.
Leakage of drain valve.
Component failure.
Check drain valve.
Replace drain valve.
draft – 31/05/2022 15:53
Summary of Contents for EBLA04E V Series
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