York YCAQ10, Руководство пользователя, Страница: 36 / 99

YORK INTERNATIONAL
36
(YCHA100)
PROBLEM CAUSE SOLUTION
F4 Fault 1. Condenser fans not operating 1. Check fans, Fuses, and Contactors.
Code Cuts out on High Dis- or rotating backwards. Air flow must be “up”.
charge Pressure as sensed 2. Too much refrigerant 2. Remove Refrigerant
by Microprocessor via 3. Air in refrigerant system 3. Evacuate and recharge
high discharge pressure 4. Defective Discharge Press. Transducer 4. Replace Discharge Press. Transducer
transducer. 5. Defective Relay Output Board 5. Replace Relay Output Board (Contact
NOTE: If external H.P. the local YORK service representative.)
Cut-out Switch trips 6. Defective Analog Input Board 6. Replace Analog Input Board (Contact
the Fault Code will be the local YORK service representative.)
an F1.
F9 Fault Code 1. Temperature sensed incorrectly 1. Verify actual ambient temperature
Cuts out on high ambient by thermistor at probe.
temperature. (Max.= 2. Fans Rotating Backwards 2. Air flow must be “up”. Correct fan
130°F. Will re-start auto- rotation.
matically if temperature 3. Air flow to unit restricted (or 3. Check installation clearances.
drops below 130°F) being re-circulated) (See page 4)
F10 Fault Code 1. Temperature sensed incorrectly 1. Verify actual ambient temperature
Cuts out on Low Ambient by thermistor. at probe.
Temperature (35°F min. 2. Check Low Ambient Temp. Cut-out 2. Adjust if necessary.
for Std. Unit. 0°F min. setting on display (Display Code 7)
for Low Ambient Unit.)
NOTE: Operation below
35°F requires Low Am-
bient Accessory Kit
Follow steps listed under GENERAL above to verify cutout set point and actual cutout reading. Factory Setting = 36°F
(or as appropriate for brine).
F11 Fault Code 1. Check LWT Cutout Point on Panel. 1. Adjust if necessary, and restart unit.
Low Water 2. Defective LWT or RWT sensor 2. Check according to following table
Temperature Shutdown (use digital volt meter)* Replace if
necessary.
Temp.° F Voltage-(DC)
30.9 1.67
33.6 1.79
36.3 1.91
38.9 2.03
41.4 2.15
43.9 2.28
46.3 2.40
48.6 2.52
50.8 2.64
53.0 2.76
55.1 2.89
57.2 3.01
59.3 3.13
61.3 3.25
63.2 3.37
*Check voltage on Analog Input Board
LWT: J20-1 to J20-3
RWT: J21-1 to J21-3