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Electric Standby Mechanical Diagnosis (Rev. 1/99)
82
Motor contactor burnout
Low line voltage
Increase voltage (must be ± 10% of
compressor motor rating)
Excessive line voltage
Reduce voltage (must be ± 10% of
compressor motor rating)
Unit operates long or
continuously
Shortage of refrigerant
Repair leak and recharge
Discharge valve leaking
Replace compressor
Thermostat faulty
Replace cab box
Dirty condenser
Clean condenser
Air in system
Purge
Compressor inefficient
Replace compressor
Plugged expansion valve
Clean or replace
Iced or plugged coil
Defrost or clean
Defective truck body insulation
Correct or replace
Too many door openings
Keep doors closed
Load too warm
Precool hot product
Excessive superheat at expansion
valve
Adjust
Door seals worn
Repair/replace
Box temperature too high
Refrigerant shortage
Repair leak and recharge
Thermostat set too high
Reset control
Expansion valve or strainer plugged
Clean or replace
Restricted lines
Clean restriction. Tubing pinched
shut
Hot load
Precool hot product
Expansion valve superheat too high
or too low
Adjust
CONDITION
POSSIBLE CAUSE
REMEDY
Содержание 914 724
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Страница 25: ...Unit Description Rev 1 99 15 1 Fan 2 Thermometer Sensor 3 Thermostat Sensor Evaporator 1 2 3 AGA358...
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Страница 107: ...97 Model 10 and 20 Schematic Diagram...
Страница 108: ...98 Model 10 Wiring Diagram...
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Страница 110: ...100 Model 20 Single Phase with Heat Option Schematic Diagram...
Страница 111: ...101 Model 20 Single Phase Wiring Diagram...