Daikin altherma 3 M Service Manual page 84

2 | Troubleshooting
Possible failure
Displayed date/time is
wrong - schedules NOT
correctly executed.
Displayed date/time is
wrong - schedules NOT
correctly executed.
Incorrect setting of unit
control method (setting
[C‑07]).
Incorrect setting of space
heating OFF temperature
(setting [4‑02]).
Preferential kWh rate
power supply settings and
electrical connections do
NOT match.
Possible failure
Hydro PCB NOT
operational.
Outdoor unit PCB
malfunction (Main PCB,
inverter PCB, ...)
Reactor coil broken.
Service manual
84
Root cause category: parameter (setting)
Root cause
▪ NOT set date/time after
initial start-up,
▪ No power supply for
more than 48 hours.
Daylight Saving Time NOT
set correctly.
Incorrect setting of unit
control method (setting
[C‑07]) (leaving water
control, room thermostat
control, ext. room
thermostat control).
Incorrect setting of space
heating OFF temperature
(setting [4‑02]).
Preferential kWh rate
power supply settings and
electrical connections do
NOT match.
Root cause category: component – electrical
Root cause
▪ No power supply,
▪ Faulty transformer,
▪ Hydro PCB malfunction.
▪ No power supply,
▪ Outdoor unit
malfunction.
Component problem.
Check
Set date/time according to
operation manual
instructions.
Check Daylight Saving Time
settings.
Check if setting [C‑07]
(leaving water control,
room thermostat control,
ext. room thermostat
control) is in set according
to the application.
Check if setting space
heating OFF temperature
(setting [4‑02]) is correct
(keep at 35°C).
Check preferential kWh
rate power supply settings
and electrical connections
(see installer reference
guide).
Check
▪ Confirm that HAP led is
blinking in
intervals,
▪ Confirm power supply
towards hydro PCB,
▪ Check good operation of
transformer.
▪ Confirm that HAP led is
blinking in
PCB
intervals,
▪ Confirm power supply
towards outdoor
PCB,
▪ Check good operation of
outdoor unit PCB.
Check continuity of the
reactor coil.
Repair
Set date/time according to
operation manual
instructions.
Set Daylight Saving Time
according to operation
manual.
Repair
▪ Re-establish power to
regular hydro PCB.
Replace hydro PCB in case
power supply and
transformer are OK but led
is NOT blinking.
▪ Re-establish power to
regular outdoor unit PCB.
Replace outdoor unit PCB
in case power supply is OK
unit but led is NOT blinking or
in case of PCB not
operating correctly.
Replace the reactor coil in
case faulty.
EBLA09~16DA + EDLA09~16DA
ESIE20-06A – 2021.03
Daikin Altherma 3 M