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Operating Instructions
35
Control System Circuit Breaker:
The control
system remote reset circuit breakers are located in
the control box. They are designed to protect the
12 volt DC control circuit from overloads. To
reset the circuit breakers, turn the unit On/Off
switch to the Off position for 30 seconds.
Control Circuit Fuse:
Located between the battery
and the unit control circuits (typically inside the
battery box). At about 60 amps, the fuse will melt
and cut battery power to the unit.
Engine Coolant High Temperature Cutout:
The
engine coolant high temperature cutout is a
temperature sensitive switch located in the engine
cooling system.
The engine coolant high temperature switch will
close and trip the engine reset if the engine
coolant temperature is greater than 215 to 225 F
(102 to 107 C).
Evaporator High Temperature Protection Switch
(Model 50):
A high temperature protective switch
is located above the evaporator coil to interrupt
the Heat cycle if the temperature above the coil
exceeds 150 F (66.0 C) during electric standby
operation.
Engine Low Oil Pressure Cutout:
The engine low
oil pressure cutout is a pressure sensitive switch
located in the engine oiling system. This switch
will trip the Engine Reset and stop the engine if
the oil pressure drops below 8 to 12 psi
(55 to 83 kPa).
Refrigerant High Pressure Cutout:
The high
pressure cutout is a pressure sensitive switch
located in the compressor head. If the refrigerant
discharge pressure exceeds the current setting,
this switch opens the circuit to the fuel solenoid,
stopping the engine. Within 30 to 50 seconds, the
engine reset will also trip because of low oil
pressure in the engine. For Model 50 units, this
switch also shuts down electric motor operation.
Refrigerant High Pressure Relief Valve:
This valve
is designed to relieve excess pressure within the
refrigeration system. Located on a high pressure
line near the condenser, it is non-repairable and
requires no adjustment. When pressure is released
from the valve, it is directed away from anyone
servicing the unit.
Preheat Buzzer (CYCLE-SENTRY Units):
The
preheat buzzer sounds when the
CYCLE-SENTRY system causes the glow plugs
to preheat.
Unit Operation
Pretrip Inspection
Pretrip inspections are a very important part of
regularly scheduled preventive maintenance
programs designed to minimize operating
problems and breakdowns before they happen.
While pretrips are not intended to take the place
of regular maintenance inspections, the following
suggested pretrip inspection should be performed
before every trip involving refrigerated cargo.
Fuel:
The diesel fuel supply must be adequate to
guarantee the operation of the engine to at least
the next check point.
Engine Oil:
The engine oil level should be at the
FULL mark on the dipstick. Never overfill.
Coolant:
Check coolant level gauge for the correct
amount of coolant. The indicator should be in the
FULL (white) range. If the coolant level is in the
ADD (red) range, add coolant to the expansion
tank. The coolant should be a 50/50 mixture of
ethylene glycol and water and provide protection
to -30 F (-34 C).
Battery:
The terminals must be tight and free of all
corrosion. Electrolyte should be at full mark.
Belts:
The belts must be in good condition and
adjusted to the proper tension. Allow 1/2 inch
(13 mm) deflection at the center of the span
between pulleys.
Electrical:
Check all electrical connections to
make certain they are securely fastened. 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.
Gasket:
The unit mounting gasket should be
tightly compressed and in good condition.
Coils:
The condenser and evaporator coils should
be clean and free of debris.
CAUTION: Do not remove the expansion
tank cap while the coolant is hot.
Summary of Contents for 914970
Page 3: ...3...
Page 10: ...Table of Contents 10...
Page 40: ...Operating Instructions 40...
Page 82: ...Electronic Controls 82...
Page 92: ...Electrical Maintenance 92...
Page 124: ...Refrigeration Maintenance 124...
Page 140: ...Hilliard Clutch Maintenance 140...
Page 160: ...Refrigeration Diagrams 160...
Page 163: ...Index 163 W wiring 85 wiring diagrams 165...
Page 164: ...Index 164...
Page 166: ...Wiring and Schematic Diagrams Index 166...
Page 167: ...167 Cab Control RD Wiring Diagram...
Page 168: ...168 RD w o Thermostat Cab Control Schematic...
Page 169: ...169 RD Cab Box Wiring Diagram...
Page 170: ...170 RD Cab Control w Thermostat Schematic Diagram...
Page 171: ...171 RD 50 STD 3 Phase Wiring Diagram Page 1 of 2...
Page 172: ...172 RD 50 STD 3 Phase Wiring Diagram Page 2 of 2...
Page 173: ...173 RD 50 STD 3 Phase Schematic Diagram Page 1 of 2...
Page 174: ...174 RD 50 STD 3 Phase Schematic Diagram Page 2 of 2...
Page 175: ...175 RD 30 STD Wiring Diagram Page 1 of 2...
Page 176: ...176 RD 30 STD Wiring Diagram Page 2 of 2...
Page 177: ...177 RD 30 STD Schematic Diagram Page 1 of 2...
Page 178: ...178 RD 30 STD Schematic Diagram Page 2 of 2...
Page 179: ...179 RD 30 C S Wiring Diagram Page 1 of 2...
Page 180: ...180 RD 30 C S Wiring Diagram Page 2 of 2...
Page 181: ...181 RD w CYCLE SENTRY Schematic Diagram Page 1 of 2...
Page 182: ...182 RD w CYCLE SENTRY Schematic Diagram Page 2 of 2...
Page 183: ...183 RD 50 C S 3 Phase Wiring Diagram Page 1 of 2...
Page 184: ...184 RD 50 C S 3 Phase Wiring Diagram Page 2 of 2...
Page 185: ...185 RD w CYCLE SENTRY Schematic Diagram Page 1 of 2...
Page 186: ...186 RD w CYCLE SENTRY Schematic Diagram Page 2 of 2...