Section 22: HEATING AND AIR CONDITIONING
PA1564
33
9.9.2 A/C
TROUBLE
CAUSE
Low suction pressure and frosting at dryer outlet.
Clogged filter.
Low Oil Level.
Check for oil leaks and for leaking oil seal. Do not
attempt to check oil level unless system has been
stabilized at least 20 minutes. See oil level
verification.
Excessively cold suction line.
Loss of contact between the expansion valve
bulb and the suction line or sticking of the
expansion valve.
Check for foreign matter and clean, repair or
replace the valve.
Excessively cold suction line and noisy
compressor.
Check superheat adjustment. Check remote bulb
contact. Check expansion valve for sticking.
Compressor squeaks or squeals when running.
Check oil level. Replace oil seal.
Noisy or knocking compressor.
Check for broken internal parts. Overhaul if
required.
Compressor vibrates.
Check and tighten compressor mounting bolts
and belt tension.
Low refrigerant level
Check for refrigerant leaks and add refrigerant if
required.
Suction pressure rises faster than 5 pounds per
minute after shutdown.
Check compressor valve for breakage or
damage.
Insufficient cooling.
Check for refrigerant leaks. Check condition of air
filter and motors.
Insufficient air flow.
Dirty or iced evaporator. Dirty air filter. Blowers
inactive. Clogged ducts.
No flow of refrigerant through expansion valve.
Filter dryer is clogged. Remote bulb has lost
charge or expansion valve is defective.
Expansion valve hisses. Bubbles in moisture and
liquid indicator.
Gas in liquid line. Add refrigerant.
Loss of capacity
Clogged filter. Obstructed or defective expansion
valve.
Superheat too high.
Reset superheat adjustment. Check for clogged
external equalizer line, or filter dryer.
Reduced air flow:
a. Dirty or clogged air filter;
b. Evaporator motor inoperative; or
c. Clogged return air ducts.
Dirty or iced evaporator coil. Clean air filter
screens. Check return ducts for obstructions.
Check blower motor.
Frequent starting and stopping on low pressure
control switch.
Lack of refrigerant. Check for leaks. Recharge.
Compressor intermittently starts and stops.
Intermittent contact in electrical control circuit.
Compressor valves not in operating position.
Non-condensable in the refrigeration system.
Leak on system, system in vacuum in low temp.
Specific symptom, pressure in system will not
correspond to ambient temperature on shutdown.
Only non-condensable will cause this.
(Example: Pressure of idle R-134a system in
80°F (26.6°C) room should be 86.4 psi (595.7
kPa). See temperature chart in this section.)
Summary of Contents for LE MIRAGE XLII BUS SHELLS
Page 1: ...COACH MANUFACTURER MAINTENANCE MANUAL LE MIRAGE XLII BUS SHELLS PA1564 1ST EDITION...
Page 12: ...Section 00 GENERAL INFORMATION 10 PA1564 FIGURE 13 METRIC US STANDARD CONVERSION TABLE 00005...
Page 13: ...Section 00 GENERAL INFORMATION PA1564 11 FIGURE 14 CONVERSION CHART 00006...
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Page 63: ...SECTION 01 ENGINE PA1564 33 FIGURE 13 POWER PLANT CRADLE INSTALLATION 01140...
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Page 229: ...FAULT CODE MANUAL Created on 00 04 25 15 30 1 FAULT CODE MANUAL B7L B7TL B12...
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Page 379: ...Section 12 BRAKE AND AIR SYSTEM PA1564 21 FIGURE 38 AIR OPERATED BRAKING SYSTEM WE...
Page 380: ...Section 12 BRAKE AND AIR SYSTEM PA1564 22 FIGURE 39 AIR OPERATED BRAKING SYSTEM W5...
Page 387: ...Section 12 BRAKE AND AIR SYSTEM PA1564 29 FIGURE 46 ABS 6S 5M CONFIGURATION...
Page 418: ...16 BW2158 Honeywell Commercial Vehicle Systems Company 4 2001 Printed in USA...
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Page 926: ...PROCEDURE NO SAV00044 REVISION 00 Page 2 of 2 Slide out...
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Page 1086: ...Section 22 HEATING AND AIR CONDITIONING PA1564 18 FIGURE 17 DOUBLE SWEEP EVACUATION SET UP...
Page 1118: ...Section 22 HEATING AND AIR CONDITIONING PA1564 50 FIGURE 54 HEATER LINE SHUTOFF VALVES WE...
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Page 1125: ...Compressor 62 11052 Rev A WORKSHOP MANUAL for MODEL 05G TWIN PORT COMPRESSOR R...
Page 1126: ...WORKSHOP MANUAL COMPRESSOR MODEL 05G TWIN PORT...
Page 1149: ...Compressor 62 11053 Rev B SERVICE PARTS LIST for MODEL 05G TWIN PORT COMPRESSOR 1 2 3 4 5 6 R...
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Page 1223: ...Section 26 XLII SLIDE OUT PA1564 11...
Page 1224: ...Section 26 XLII SLIDE OUT PA1564 12 FIGURE 16 KEYLESS BUSHING INSTALLATION INSTRUCTION...