Unit Description
22
Engine Oil Dipstick
Use the engine oil dipstick to check the engine oil level.
Receiver Tank Sight Glass
The receiver tank sight glass is used to assist in checking the
amount of refrigerant in the system.
Compressor Oil Sight Glass
The compressor oil sight glass is used to check the relative
level of compressor oil in the compressor sump.
Unit Protection Devices
High Pressure Cutout Switch (HPCO):
This normally
closed switch monitors the discharge pressure at the
compressor. It opens on high discharge pressure to shut the unit
down to prevent damage.
Electronic Throttling Valve (ETV) -:
(T-1200R, T-1200R
SPECTRUM):
This component is an electromechanical control device used to
limit the suction pressure to the compressor. The valve is
controlled by the microprocessor controller.
Engine Oil Pressure Switch/Sensor:
The engine oil
pressure switch/sensor is located on the filter head above the
bypass oil filter. Engine oil pressure should rise immediately
on starting. If engine oil pressure drops below 10 ± 2 psig (69 ±
14 kPa), the switch/sensor signals the microprocessor to stop
the engine.
Preheat Buzzer:
The preheat buzzer sounds when the
CYCLE-SENTRYTM system energizes the glow plugs. This
should warn anyone near the unit that the
CYCLE-SENTRYTM system is about to start the diesel
engine.
Coolant Temperature Sensor:
This sensor provides an
engine coolant temperature input to the microprocessor. If the
engine coolant temperature is too high, the controller stops the
unit and records an alarm.
CAUTION: Make sure the engine is turned off before
attempting to check the engine oil.
