York YCAQ10 User Manual

YORK INTERNATIONAL 39
FORM 150.40-NM25
SINGLE CIRCUIT UNITS
TROUBLE-SHOOTING CHART
PROBLEM CAUSE SOLUTION
No display on panel 1. No 115VAC to 2T 1. Check wiring and fuse (8 FU). Check
Unit will not operate emergency stop contacts 41 to 3 .
2. Faulty wiring 2. Check wiring 2T to PSB
3. Combo Board Defective 3. Replace Combo Board
4. 2T defective 4. Replace 2T
5. Micro Board defective 5. Replace Micro Board (Contact the
local YORK service representative.)
“A” Code on Display 1. No Flow 1. Check Chilled Liquid Flow
2. Flow Switch Installed Improperly 2. Check that Flow Switch is Installed
According to Manufacturer’s Instructions.
3. Defective Flow Switch 3. Replace Flow Switch
4. Remote Stop 4. Check Cycling Devices connected to
terminals 3 & 4 of the Power Panel
Terminal Block
5. Defective Run Permissive (R.P.) 5. Replace R.P. Relay
Relay
6. Defective Combo Board 6. Replace Combo Board (Contact
the local YORK service representative.)
F1 Fault Code 1. External High Pressure Switch 1. Check External High Pressure Switch
Faults on Motor Current. tripped and related problem in “Cuts-out on
Motor Contactor May or High Discharge Pressure” section
may not Energize (F4 Fault Code)
2. External Motor Overload tripped. 2. Check for defective External Motor
Overload, wiring, & motor problems
3. Improper System High Voltage 3. Check System High Voltage Supply
Supply
4. Defective motor 4. Check motor
5. Faulty wiring single phasing 5. Check wiring
6. Combo Board defective 6. Replace Combo Board (Contact
the local YORK service representative.)
7. Defective Current Transformer 7. Replace defective Current Transformer
8. Defective 7FU or 120VAC power 8. Check fuse (7FU) & wiring
missing from Relay Output Board
and motor contactors.
9. Defective Motor Contactor or 9. Replace Contactor or Auxiliary
Auxiliary contacts Contacts
10. Defective Relay Output Board 10. Replace Relay Output Board (Contact
the local YORK service representative.
F2 Fault Code 1. Low Oil Charge 1. Oil level should be visible in either sight
Low Oil Pressure Fault glass at all times. Add YORK “C” oil
if necessary.
2. Too much refrigerant in oil, 2. Check Crankcase Oil heater operation.
particularly on start-up. (350 Watt heater should be “ON’’ when
unit is “OFF”. Measure Heater Current.
(Should be Min. 2 Amps.)
3. Liquid Line Solenoid Valve (LLSV) 3. Check wiring & LLSV
not opening.
4. Suction Press. Transducer defective 4. Replace Transducer
5. Oil Press. Transducer defective 5. Replace Transducer

York YCAQ10 Specifications

General

Brand	York
Model	YCAQ10
Category	Chiller
Language	English