62-11848 2-10
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 following fuses and safety devices.
(a) This fuse is located close to the vehicle battery (12 V).
Unsafe Conditions Safety Device
Automatic re-
start with fault
cleared
Device setting
1 Excessive drop in pressure
Automatic reset of low
pressure switch (LP)
YES
Cutout: -5.7 inHG ± 3psig
(-0.19 bar)
Timer 5 min
2 Excessive current draw on all
Microprocessor outputs
(Evaporator and Condenser fan)
Electronic relay YES Self-protected opening
3 Excessive current draw Control
Circuit
Fuse on electronic board NO Self-protected opening
4 Excessive current draw Motor
Compressor
Fuse YES See electrical wiring diagram
5 Excessive current draw
Evaporator and Condenser fan
motors
Electronic relay YES Self-protected opening
6 Excessive Compressor
discharge pressure
Automatic reset of High
pressure switch (HP1)
YES Timer: 5 min
7 Excessive current draw unit in
road operation
Road Supply Fuse (FMP) NO Opens at 25A (12V)
8 Excessive current draw of
Control Circuits
Main Road Fuse F1 (a) NO Opens at 40A (12V)
9 Compressor Motor overheat Klixon in Winding NO
Self-protected opening
opens 234°F (130°C)
10 Clutch malfunction - road
(insufficient current draw)
Electronic relay YES
Detection of min. threshold
at 750 mA
11 Low battery voltage Microprocessor YES Cut-out/cut-in at 10V
12 Excessive current draw on
Ignition Circuit (Neiman)
Fuse (F1) NO Opens at 2A
13 Battery cable short protection Fuse (FR1) NO Opens at 125A (12V)
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