Daikin EWYQ230DAYN [425/524] Checking the temperature sensors

Daikin EWYQ230DAYN [425/524] Checking the temperature sensors
ESIE06-05 Checking the Temperature Sensors
Part 3 – Troubleshooting 3–25
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Part 3
2 Checking the Temperature Sensors
Introduction If the cause of the problem is related to the temperature sensors, the sensors should be checked prior
to changing the PCB or an output device.
Temperature
Sensors
In multiple scroll software, four different types of NTP temp sensors are programmed. On the unit, only
NTC type 1 and 2 are actually used. In this chapter, the resistance/temp table is described.
How to check To check the temperature sensors, proceed as follows:
Temperature
Sensor Types
The table below contains the four different sensor types programmed in the controller.
Temperature
Sensor List
The table below contains the list with the sensor name and the sensor type used in the unit.
Step Action
1 Disconnect the sensor from the PCB.
2 Measure the temperature and the resistance value.
3 Check whether the measured values correspond with the values in the appropriate table.
Type Also used in the following units
Type 1: PF-46 F (ST8602/8603/8604 use
PB-46F
Temp Sensor Sky Air/VRV/ DENV scroll chillers
Type 2: ST 8606 Discharge sensor Sky Air / VRV
Type 3: PB-43 Water temp DIL screw chillers
Type 4: Carel Sensor Water temp DENV scroll and screw chillers
Part number Description
R1T ambient temperature sensor Type 1
R2T inlet water temperature sensor Type 1
R3T outlet water temperature sensor Type 1

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