Safety Devices - Carrier Neos 100S Operation & Service Manual

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