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Troubleshooting
Service manual
82
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
ESIE20-06A – 2021.03
Possible failure
Root cause
Check
Repair
Pump keeps running all the
time during space heating
(cooling) operation.
Wrong setting of [F‑0D] -
pump operation.
Check pump operation
mode setting [F‑0D].
Change setting [F‑0D] from
continuous operation
(value 0) to Sample (1) or
Request (2). See installer
reference guide for
applicable value.
Setting disinfection
operation day [2‑00] was
set to 0 (each day).
Setting disinfection
operation day [2‑00] was
set to 0 (each day).
Check setting [2‑00].
Adjust setting if necessary.
Unit is running in
emergency operation and
is using backup heater
ONLY. [4‑06] is set to 1.
Unit is running in
emergency operation and
is using backup heater
ONLY. [4‑06] is set to 1.
Check setting [4‑06].
Adjust setting if necessary.
Backup heater equilibrium
point was set too high.
Setting "equilibrium
temperature" [5‑01] was
set too high.
Check setting [5‑01].
Change setting [5‑01] to
less quickly allow backup
heater operation.
Setting domestic hot water
operation mode [6‑0D]
NOT set optimally.
Setting domestic hot water
operation mode [6‑0D] is
set to 0 (reheat ONLY). This
will cause the system to
work too frequently in
domestic hot water
operation and less in space
heating.
Check setting [6‑0D] in
combination with the re-
heat setpoint [6‑0C].
It is advisable to set to
factory setting (
schedule) and program the
schedule to heat the
domestic hot water during
periods of no space
heating required.
Root cause category: component – electrical
Possible failure
Root cause
Check
Repair
Deviation of outlet water
after backup heater
thermistor will influence
the backup heater control.
▪
Deviation of outlet water
after
backup
heater
thermistor
(lower
temperature measured
than actual),
▪
Bad contact between
sensor and pipe.
Check outlet water after
backup heater thermistor.
▪
Replace outlet water
after
backup
heater
thermistor
when
required,
▪
Replace hydro PCB when
required.
Root cause category: system design
Possible failure
Root cause
Check
Repair
Water circuit – requested
capacity too high causing
the system to run at full
capacity.
Incorrect system selection. Check required capacity by
heat load calculation. See
the capacity tables in the
engineering data book to
know max. system capacity
at indicated conditions.
Adapt system design.
Summary of Contents for ALTHERMA
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