Structural Maintenance
12-21
Testing the Damper Motor Heater
1.
• Units with TG-V: Disconnect the thermostat switch wire from the 7K wire in the evaporator wire harness.
• Units with TG-VI, µP-IV, µP-V, µP-VI or SR-2: Disconnect the damper motor connector from the evaporator harness.
2.
• Units with TG-V: Check the resistance between the thermostat switch wire and CH.
• Units with TG-VI, µP-IV, µP-V, µP-VI or SR-2: Check the resistance between pins 3 and 4 in the 6-pin connector on the
damper motor.
a. When the temperature of the thermostat switch is above 2 C, there should be no continuity between the thermostat switch
wire and CH (or pins 3 and 4). If there is continuity, the thermostat switch is defective.
b.When the temperature of the thermostat switch is below -16 C, the resistance between the thermostat switch wire and CH
(or pins 3 and 4) should be approximately 12 ohms. If not, check the switch and the resistance wire separately.
3. To check the switch and resistance wire separately, cut the splice connector that connects the switch wire to the resistance
wire.
4. Check the resistance wire by checking the resistance between the end of the resistance wire and CH (or pin 4). The resistance
should be approximately 12 ohms. If not, the resistance wire is defective.
5. Check the thermostat switch by checking the resistance between the switch wires (or switch and pin 3).
a. When the temperature of the thermostat switch is above 2 C, there should be no continuity through the switch. If there is
continuity, the thermostat switch is defective.
b.When the temperature of the thermostat switch is below -16 C, there should be continuity through the switch. If not, the
thermostat switch is defective.
Damper Motor Heater – SMX (After 5/93), SMX-II
and SL
1.
Thermostat Switch
2.
Thermostat Switch Wires
3.
Resistance Wire
4.
Diode
5.
Pin 3 (CL Wire)
6.
Pin 4 (Resistance Wire)
7.
CL Wire
8.
Resistance Wire
Содержание SLXi Spectrum
Страница 17: ...Safety Precautions 2 5 Warning Decals...
Страница 18: ...Safety Precautions 2 6 Warning Decals Information Decals...
Страница 74: ...Unit Description 5 30...
Страница 128: ...Controller Operation 7 28...
Страница 156: ...Electrical Maintenance 8 28...
Страница 177: ...Engine Maintenance 9 21 Integral Fuel Solenoid Components 1 Integral Fuel Solenoid 2 O ring 3 Fuel Injection Pump Groove...
Страница 234: ...Refrigeration Maintenance 10 22...
Страница 309: ...13 Mechanical Diagnosis TK 482 TK 486 and TK 486V Engines 13 2...
Страница 316: ...Mechanical Diagnosis 13 8...
Страница 322: ...Refrigeration System Diagnosis 14 6...
Страница 332: ...Single Temperature Refrigeration System Diagrams 15 10...
Страница 339: ...Multi Temperature Refrigeration System Diagrams 16 7...
Страница 340: ...Multi Temperature Refrigeration System Diagrams 16 8...
Страница 342: ...Wiring Diagrams and Wiring Schematics 17 2...