Thermo King Spectrum DE 30-2, Руководство пользователя, Страница: 38 / 140

Operating Instructions
38
High Pressure Relief Valve:
The high pressure
relief valve is designed to relieve excess pressure
within the refrigeration system. The valve is a
spring-loaded piston that lifts off its seat when
refrigerant pressure exceeds 500 psi (3447 kPa).
The valve will reseat when the pressure drops to
400 psi (2758 kPa). The valve could possibly leak
refrigerant after it has relieved excess pressure.
Tapping the valve lightly may help the valve
reseat and seal properly. The valve is
non-repairable and requires no adjustment. If the
valve fails to reseat properly, remove the
refrigerant charge and unscrew and replace the
valve.
The high pressure relief valve is located on the
receiver tank. Its location is such that when the
pressure is expelled from the valve, it would be
directed away from anyone servicing the unit.
Low Oil Level Switch:
The low oil level switch
closes if the oil drops below a certain level and
stays closed for a specified time, the
microprocessor will shut the unit down and record
alarm code 66.
Preheat Buzzer:
The preheat buzzer sounds when
the CYCLE-SENTRY system energizes the glow
plugs. This should warn anyone near the unit that
the CYCLE-SENTRY system is about to start the
diesel engine.
Unit Operation
Manual Pretrip Inspection (Before
Starting Unit)
The following Manual Pretrip Inspection should
be completed before starting the unit and loading
the trailer. While the pretrip inspection is not a
substitute for regularly scheduled maintenance
inspections, it is an important part of the
preventive maintenance program designed to head
off operating problems and breakdowns before
they happen.
Fuel:
The diesel fuel supply must be adequate to
guarantee engine operation to the next check
point.
Engine Oil:
The engine oil level should be at the
FULL mark with the dipstick turned (threaded)
into oil pan. Never overfill.
Coolant:
The engine coolant must have antifreeze
protection to -30 F (-34 C). Alarm Code 37
indicates low coolant. Add coolant in the
expansion tank.
Battery:
The terminals must be clean and tight.
Belts:
The belts must be in good condition and
adjusted to the proper tensions.
Electrical:
The electrical connections should be
securely fastened. The wires and terminals should
be free of corrosion, cracks or moisture.
Structural:
Visually inspect the unit for leaks,
loose or broken parts and other damage. The
condenser and evaporator coils should be clean
and free of debris. Check the defrost drain hoses
and fittings to make sure they are open. Make sure
all the doors are latched securely.
Starting Unit With Electronic Full
Pretrip Test
This procedure is used for a complete checkout of
the trailer, unit, and unit control circuits. It should
be used when first starting the unit for a trip
before the cargo is loaded. A full Pretrip test
procedure may take up to 30 minutes and the unit
will run unattended.
1. Perform a Manual Pretrip Inspection.
2. Adjust the setpoints to the desired load
temperatures (refer to the appropriate
Microprocessor Diagnosis Manual for detailed
information about adjusting the setpoints).
a. Use the Select key to display the Standard
Display for the zone whose setpoint is to
be changed.
b. Change the setpoint display with the
A
RROW
keys.
CAUTION: Do not remove expansion
tank cap while coolant is hot.
CAUTION: Do not add “GREEN” or
“BLUE-GREEN” conventional coolant to
cooling systems using “RED” Extended
Life Coolant, except in an emergency. If
conventional coolant is added to Extended
Life Coolant, the coolant must be changed
after 2 years instead of 5 years.