Sinclair SCV-EB Series Service Manual page 51

5.7.3 Procedure
E3 / H2 / H3 / Ed / HA / H5 / H9/ Eb / E7
Temperature sensor is not installed
Temperature sensor connection on hydro
system PCB is loose
Temperature sensor is affected by
Temperature sensor has short-circuited
Replace hydro system PCB
Notes:
Total outlet water temperature sensor(T1), liquid refrigerant temperature sensor(T2), gas refrigerant temperature
1.
sensor(T2B), inlet water temperature sensor (Tw_in), outlet water temperature sensor (Tw_out) connection is port
CN6 on the hydro system PCB.
Room temperature sensor(Ta)
Outlet water for zone 2 temperature sensor (Tw2) connection is port CN15 on the hydro system PCB.
Buffer tank upper temperature sensor(Tbt) connection is port CN24 on the hydro system PCB.
2. Measure sensor resistance. If the resistance is too low, the sensor has short-circuited. If the resistance is not
consistent with the sensor's resistance characteristics table, the sensor has failed.
No
No
1
No
moisture or water
No
2
or failed
No
Yes
Installed the temperature sensor
Yes
Ensure the sensor is connected properly
Yes
Dry the sensor
Yes
Replace the sensor
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