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YORK INTERNATIONAL
142
PROBLEM
CAUSE
SOL
“LOW SUCTION PRESSURE”
4. TXV defective.
4. Replace TXV.
FAULT (CONT’D)
5. Reduced flow of air
5. Check CFM
through the evaporator.
6. Defective suction pressure
6. Replace transducer/low
transducer/low pressure
pressure switch or faulty
switch or wiring
wiring. Refer to “Service”
section for pressure/voltage
formula.
7. LLSV defective
7. Replace LLSV
“HIGH DISCHARGE
1. Condenser fans not operating
1. Check fan motor, fuses,
PRESSURE” FAULT
or operating backwards.
and contactors. Assure fan
blows air upward.
2. Too much refrigerant.
2. Remove refrigerant.
3. Air in refrigerant system.
3. Evacuate and recharge
system.
4. Defective discharge
4. Replace discharge pressure
pressure transducer.
transducer. Refer to Service
section for pressure/voltage
formula.
CONT’D
Control Service and Troubleshooting
Summary of Contents for MILLENNIUM YCUL0016SC
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