Daikin Altherma EBLQ011CA3V3 - Thermistors; Refrigerant Thermistors

2 Components
Service manual
82
EBLQ+EDLQ011~016CAV3+W1 + EBLQ+EDLQ011~016CA3V3+W1
+ EK(2)CB07CAV3 + EKMBUHCA3V3+9W1
Daikin Altherma – Monobloc
ESIE18-04 – 2019.02
ab cd e
a Screw
b Solenoid valve coil
c Bracket
d Screw
e Solenoid valve body
2 Install and tighten the screw to fix the solenoid valve coil to the
solenoid valve body.
3 Install and tighten the screw to fix the solenoid valve to the
bracket.
4 Route the solenoid valve harness towards the switch box.
5 Connect the solenoid valve connector to the main PCB.
WARNING
When reconnecting a connector to the PCB, do NOT apply
force, as this may damage the connector or connector pins
of the PCB.
6 Fix the solenoid valve harness using new tie straps.
INFORMATION
Replace all cable ties that were cut during removal.
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.
2.23 Thermistors
NOTICE
Select the correct type.
2.23.1 Refrigerant 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: Turn OFF the unit via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work, see "2.19 Plate
work"on page77.
1 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 or
ambient.
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"on
page82.
No Correctly install the thermistor,
see "Repair procedures"on
page83.
To perform an electrical check of the specific thermistor
Prerequisite: First perform a mechanical check of the thermistor,
see "Checking procedures"on page82.
1 Locate the thermistor.
INFORMATION
Remove the thermistor from its holder if not reachable with
a contact thermometer.
2 Measure the temperature using a contact thermometer.
Name Symbol Location
(PCB)
Connector
(pins)
Type
Air
thermistor
R1T Main X11:1‑2 1
Discharge
pipe
thermistor
R2T Main X12:5‑6 1
Refrigerant
liquid
thermistor
R3T Main X7A: 1‑2 1
Suction
thermistor
R3T Main X12: 3‑4 1
Heat
exchanger
thermistor
R4T Main X12: 5‑6 1
Heat
exchanger
(middle)
thermistor
R5T Main X12: 7‑8 1
Liquid
thermistor
R6T Main X13: 1‑2 1
Fin
thermistor
(only for
three phase
units)
R7T Inverter X111A: 1‑2 1
Fin
thermistor
(only for
single phase
units)
R10T Inverter X111A: 1‑2 1
INFORMATION
The thermistors may vary according to the specific unit.
3 Determine the thermistor resistance that matches the measured
temperature.