York YHAU-CW, Manual

Page: 160 / 168

JOHNSON CONTROLS
160
FORM 155.31-ICOM2.EN.UL
ISSUE DATE: 12/21/2018
SECTION 8 – TROUBLESHOOTING
TABLE 40 - PUMP INTERLOCKS
ITEM CAUSE COUNTERMEASURE
1 Water pump interlock was not
established
Check the water pump interlock.
TABLE 41 - LOW COOLING WATER
INLET TEMPERATURE
ITEM CAUSE COUNTERMEASURE
1 Cooling water inlet
temperature control system is
abnormal
Check the cooling water inlet temperature control system. If this problem
occurs, the absorption chiller performs the diluting operations automatically, and
then stops. Go to the Control Center immediately and confirm that the diluting
operation took place. If the diluting operation did not occur, dilute the solution
according to the procedure shown in
Manual Refrigerant Blow Down and
Diluting Method on page 137 .
If these problems occur, the absorption chiller per-
forms the dilution operation automatically and stops.
Go to the Control Center immediately and confirm that
the dilution took place. If the dilution operation did not
run, dilute the solution. Use the instructions shown in
Manual Refrigerant Blow Down and Diluting Method
on page 137 .
TABLE 42 - ABNORMAL CONTROL SENSOR
ITEM CAUSE COUNTERMEASURE
1 Contact failure Tighten terminal in control panel.
2 Sensor abnormal or
disconnected
Contact your local Johnson Controls Service Office.
3 Inductive noise
TABLE 43 - CPU ABNORMAL
ITEM CAUSE COUNTERMEASURE
1 Control board malfunction Contact your local Johnson Controls Service Office.