Daikin Altherma 3 M - Water Side Thermistors

3 | Components
Service manual
254
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
ESIE20-06A – 2021.03
INFORMATION
Some of the thermistors are wired to the same connector. See connector and pin
information of the thermistors at the start of the electrical check procedure and
"6.2Wiring diagram"[4314]. ALWAYS replace the complete set of thermistors wired
to the same connector.
4 When installing the complete set of thermistors wired to the same connector:
▪ Install all other thermistors wired to the connector in their thermistor
holder,
▪ Route the thermistor harness of all thermistors towards the appropriate
PCB,
▪ Connect the thermistor connector to the appropriate PCB.
WARNING
When reconnecting a connector to the PCB, make sure to connect it on the correct
location and do NOT apply force, as this may damage the connector or connector
pins of the PCB.
5 Fix the thermistor harness using new tie straps
6 Install the insulation around the thermistor.
7 Fix the insulation and the thermistor wire using new tie straps.
Is the problem solved? Action
Yes No further actions required.
No Return to the troubleshooting of the
specific error and continue with the
next procedure.
3.20.2 Water side thermistors
Checking procedures
INFORMATION
It is recommended to perform the checks in the listed order.
To perform a mechanical check of the specific thermistor
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
1 Remove the required plate work, see "3.17Plate work"[4230].
2 Locate the thermistor and remove the insulation if needed. Check that the
thermistor is correctly installed and that there is thermal contact between the
thermistor and the piping.
Is the thermistor correctly installed
(thermal contact between the
thermistor and the piping)?
Action
Yes Perform an electrical check of the
specific thermistor, see "Checking
procedures"[4254].
No Correctly install the thermistor, see
"Repair procedures"[4258].