Daikin EBLA04E V Series Service Manual page 95

Possible failure
Too high (space heating) or
too low (space cooling)
setpoint on room
thermostat.
Possible failure
Too high leaving water
temperature (LWT) -
weather dependent.
User interface thermostat
used with setting [C‑07] on
value 1 (= external
thermostat control).
Pump keeps running all the
time during space heating
(cooling) operation.
Setting disinfection
operation day [2‑00] was
set to 0 (each day).
Unit is running in
emergency operation and
is using backup heater
ONLY. [4‑06] is set to 1.
Backup heater equilibrium
point was set too high.
Setting domestic hot water
operation mode [6‑0D]
NOT set optimally.
EBLA04~08E + EDLA04~08E
Daikin Altherma 3 M
ESIE22-09 – 2022.05
Root cause
User set too high (space
heating) or too low (space
cooling) room setpoint by
schedule or manual
operation.
Root cause category: parameter (setting)
Root cause
Incorrect weather
dependent setting --> too
high LWT limit set
[1‑00]~[1‑09].
Wrong setting of [C‑07] -
unit control method.
Wrong setting of [F‑0D] -
pump operation.
Setting disinfection
operation day [2‑00] was
set to 0 (each day).
Unit is running in
emergency operation and
is using backup heater
ONLY. [4‑06] is set to 1.
Setting "equilibrium
temperature" [5‑01] was
set too high.
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
Check room thermostat
setpoint.
Check
Check leaving water
temperature (LWT) high
limit in weather dependent
(setting [1‑03]).
Check setting [C‑07].
Check pump operation
mode setting [F‑0D].
Check setting [2‑00].
Check setting [4‑06].
Check setting [5‑01].
Check setting [6‑0D] in
combination with the re-
heat setpoint [6‑0C].
draft – 31/05/2022 15:53
3 | Troubleshooting
Repair
Adapt room thermostat
setpoint.
Repair
Adapt high leaving water
temperature (LWT) limit
for weather dependent
heating (setting [1‑03]).
Adjust setting to match
application - see installer
reference guide.
Change setting [F‑0D] from
continuous operation
(value 0) to Sample (1) or
Request (2). See installer
reference guide for
applicable value.
Adjust setting if necessary.
Adjust setting if necessary.
Change setting [5‑01] to
less quickly allow backup
heater operation.
It is advisable to set to
factory setting (reheat +
schedule) and program the
schedule to heat the
domestic hot water during
periods of no space
heating required.
Service manual
95