Repair Section
63
8.7 Inspection of Electronic Expansion Valve Control Coil
• Measure resistance across the connector pins
of the electronic expansion valve control coil.
• Between connector pins {at 68 °F (20 °C)}
- Blue-Red Approx. 46 ohm
- Amber-Red Approx. 46 ohm
- Yellow-Red Approx. 46 ohm
- White-Red Approx. 46 ohm
• If the measured resistance is not equal to these
standard values, replace the electronic
expansion valve control coil.
8.8 Inspection of Thermistor
• Using an ohmmeter, check the resistance
value across the 2-pin connector.
• Thermistors:
- Evaporator inlet air thermistor (RTS2).
- Entering water thermistor (EWTS).
- Condenser thermistor (CTS1).
- Evaporator pipe inlet thermistor (CTS2).
- Evaporator pipe outlet thermistor (CTS3).
8.9 Inspection of Wiring Connection
• Refer to the wiring diagrams on page 25, and check the connection of each wire.
CAUTION
Secure the wires using clamps to prevent contact with the edges of the structure, etc. Secure the
wires in the same position as prior to removal.
I003194
1 2 3 4 5
Connector
Number
Wire
Color
1 Blue
2 Amber
3 Yellow
4 White
5 Red
I003204
0
5
10
15
20
32
(0)
41
(5)
50
(10)
59
(15)
68
(20)
77
(25)
86
(30)
95
(35)
104
(40)
133
(45)
122
(50)
Temp.°F (°C)
Resistance (k ohm)
Thermistor Specification
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