Inaccurate Temperature Control - Daikin Altherma EBLQ011CAV3 Service Manual

Possible failure
Backup heater operation disabled
(setting [4‑00] is set to 0).
Setting domestic hot water
operation mode [6‑0D] NOT set
optimally.
Root cause category: installation
Possible failure
3‑way valve does NOT switch
correctly between space heating
connection and domestic hot water
connection.
Root cause category: component – electrical
Possible failure
3‑way valve blocked.
Root cause category: system design
Possible failure
Water circuit – requested capacity
too high.
Water circuit - water volume too
big.
Water circuit - pressure drop too
big.
1.5.12

Inaccurate temperature control

Root cause category: parameter (setting)
Possible failure
Incorrect setting of unit control
method (setting [C‑07]).
Incorrect setting of pump operation
mode (continuous, sample,
request) (setting [F‑0D]).
Root cause category: installation
Possible failure
User interface – thermostat sensor
value NOT representing room
temperature.
EBLQ+EDLQ011~016CAV3+W1 + EBLQ+EDLQ011~016CA3V3+W1
+ EK(2)CB07CAV3 + EKMBUHCA3V3+9W1
Daikin Altherma – Monobloc
ESIE18-04 – 2019.02
Root cause
Setting backup heater operation
mode [4‑00] is set to 2 (ONLY
domestic hot water).
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.
Root cause
3‑way valve incorrectly mounted.
Root cause
Component failure.
Root cause
Incorrect system selection.
▪ Long water piping,
▪ Too many heating emitters.
▪ Too small water piping,
▪ Too long water piping,
▪ Too many heating emitters.
Root cause
Incorrect setting of unit control
method (setting [C‑07]) (leaving
water control, room thermostat
control, ext. room thermostat
control).
Incorrect setting.
Root cause
Bad location of thermostat sensor
(external influence) in case of
room thermostat control (setting
[C‑07]=2).
Check
Check setting [4‑00].
Check setting [6‑0D].
Check
Check the 3‑way valve.
Check
Check the 3‑way valve.
Check
Check required capacity by heat
load calculation. See the capacity
tables in the engineering data
book to know max. system
capacity at indicated conditions.
Check required capacity by heat
load calculation. See the capacity
tables in the engineering data
book to know max. system
capacity at indicated conditions.
Compare the pressure drop of the
total system with the water pump
characteristics (See check of water
pump). Decreased water flow will
cause a drop in capacity.
Check
Check if setting [C‑07] (leaving
water control, room thermostat
control, ext. room thermostat
control) is set according to the
application.
Confirm setting [F‑0].
Check
Check if user interface is mounted
in the correct position to measure
the correct room temperature.
1 Troubleshooting
Repair
Change setting [4‑00] to 1.
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.
Repair
Correct the position of the 3‑way
valve.
Repair
Replace the 3‑way valve.
Repair
Adapt system design.
Adapt system design.
Adapt system design.
Repair
Adjust setting to match application.
Adjust setting [F‑0] if required.
(Factory setting: [F‑0]=1).
Repair
Correct the position of the user
interface for more accurate room
temperature measurement.
Service manual
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