2-14
62--611XX--20 (03/04)
2.7
SAFETY DEVICES
System components are protected from damage caused by unsafe operating conditions by automatically shutting
down the unit when such conditions occur. This is accomplished by the safety devices listed in Table 2-4.
Table 2-4 Safety Devices
Unsafe Conditions
Safety Device
1. Low engine lubricating oil pressure
Oil pressure safety switch OP automatic reset
2. High engine cooling water temperature
Water temperature sensor WTS
3. Excessive current draw by glow plug cir-
cuit , control circuit or starter solenoid (SS)
Fuse (F1)
4. Excessive current draw by controller
Fuse (F2)
5. Excessive current draw by control circuit
Fuse (F3)
6. Excessive current draw by speed control
solenoid
Fuse (F4)
7. Excessive compressor discharge pressure High pressure cutout switch HP automatic reset
8. Excessive compressor discharge tempera-
ture
Compressor discharge temperature sensor CDT
9. Excessive current draw by evaporator fan
motors
Fuses (F21, F22, F23)
10. Heater over temperature
High temperature klixon
11. Excessive current draw by heaters
Fuses (F14 to F19, F30 to F32)