–115–
(3)
Thermistor (Liquid and gas piping temperature detection)
Be careful when removing heavy parts.
Procedure
Photos
1. Remove the service panel
1
Use the procedure under (1)-1.2 to check TH11,
TH12, and TH15.
2. Disconnect the piping sensor lead from the control-
ler panel.
1
TH11 - TH12 (CN10)
2
TH15, TH16 (CN11)
3. Pull the temperature sensor from the temperature
sensor housing and replace it with a new sensor.
4. Connect the temperature sensor lead securely to
the controller board.
(4) Pressure Sensor
Procedure
Photos
1. Remove the sensor panel.
1
Use the procedure under (1)-1.2 to check PS1
and PS3.
2. Disconnect the connector of the applicable pressure
sensor from the controller board and insulate the
connector.
1
Liquid pressure sensor (CNP1)
2
Intermediate pressure sensor (CNP3)
3. Install a new pressure sensor at the location shown
in the photograph, and plug the connector into the
controller board.
Important
1
In the case of gas leakage from the pressure sen-
sor, take actions to fix the leak before performing
the above procedure.
TH15 TH11 TH12
TH16
PS1
PS3
