FORM 150.40-NM20
37
YORK INTERNATIONAL
(YCHA100)
PROBLEM
CAUSE
SOLUTION
Low Compressor Oil
1. Low Oil Charge
1. Oil level should be visible in either
Level (Particularly on
sight glass at all times. Add YORK “C”
Start-Up)
oil if necessary.
2. Excessive Flood back of Liquid
2. Adjust Thermal Expansion Valve (TXV)
Refrigerant
or replace Power Element. Check TXV
Bulb Location. Should be located on
suction line at least 8"-10" from nearest
elbow. Bulb should be at 4 o’clock or
8 o’clock position, have good contact
with suction line & be well insulated
from surrounding air.
Crankcase Heater won’t
1. Open in 115VAC wiring to heater
1. Check wiring
Energize (should energize
2. Defective Heater
2. Replace Heater
anytime unit is “OFF”)
(Min. Current draw =
3. Auxiliary contacts of Compressor
3. Replace Contactor
2 amps)
Motor Contactor defective.
Compressor won’t load
1. Suction Pressure > 105 PSIG
1. Excessive load. Check OPERATING
(solenoid valve de-energizes
LIMITATIONS on page 3. Allow unit to
to load compressor)
operate until suction procedure drops
to 95 PSIG.
2. Discharge Pressure > 390 PSIG
2. Check OPERATING LIMITATIONS on
page 3. Will reload @ 330 PSIG.
3. Demand not great enough
3. OK
4. Defective Loading Solenoid
4. Replace Compressor Loading Solenoid
5. Faulty Wiring to loading Solenoid
5. Check Wiring
6. Defective Water Temp. Sensor
6. Replace appropriate Sensor (LWT or RWT)
(See chart under F11 Fault Code)
7. Defective Evaporator Transducer
7. Replace Transducer
8. Relay Output Board Defective
8. Replace Relay Output Board (Contact the
local YORK service representative.)
9. Defective Micro Board
9. Replace Micro Board (Contact the
local YORK service representative.)
Lack of Cooling Effect
1. Fouled Evaporator Surface
1. Contact the local YORK Service Rep.
2. Faulty Compr. Suction and/or
2. Contact the local YORK Service Rep.
Discharge Valves
Summary of Contents for YCAQ10
Page 20: ...YORK INTERNATIONAL 20 LD01779 YCHA100 FIG 9 WIRING DIAGRAM YCHA100...
Page 21: ...FORM 150 40 NM20 21 YORK INTERNATIONAL YCHA100 LD01779 D...
Page 22: ...YORK INTERNATIONAL 22 LD01780 L YCHA100 FIG 9 Continued...
Page 23: ...FORM 150 40 NM20 23 YORK INTERNATIONAL LD01780 R YCHA100...
Page 24: ...YORK INTERNATIONAL 24 YCHA100 LD01781 FIG 9 Continued...
Page 25: ...FORM 150 40 NM20 25 YORK INTERNATIONAL LD01782 YCHA100...
Page 46: ...YORK INTERNATIONAL 46 LD01787...
Page 47: ...FORM 150 40 NM20 47 YORK INTERNATIONAL LD01788...
Page 48: ...YORK INTERNATIONAL 48 LD01789...
Page 49: ...FORM 150 40 NM20 49 YORK INTERNATIONAL LD01790...
Page 50: ...YORK INTERNATIONAL 50 LD01791...
Page 51: ...FORM 150 40 NM20 51 YORK INTERNATIONAL LD01792...
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