York YHAU-CL Series - TABLE 40 - Pump Interlocks; TABLE 41 - Low Cooling Water Inlet Temperature; TABLE 42 - Abnormal Control Sensor; TABLE 43 - CPU Abnormal

JOHNSON CONTROLS
158
FORM 155.30-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 operation automatically and then stops.
•
Go to the Control Center. Conrm that the diluting operation is performed.
•
If the dilution operation did not run, dilute the solution according to the procedure
shown in Manual Refrigerant Blowdown and Diluting Method on page 135.
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 Ofce.
3 Inductive noise
If any of the problems listed in the table above occur,
the absorption chiller performs the diluting operation
automatically and then stops. Go to the Control Center
immediately. Confirm that the dilution operation ran.
If it did not, dilute the solution according to the pro-
cedure shown in Manual Refrigerant Blowdown and
Diluting Method on page 135.
TABLE 43 - CPU ABNORMAL
ITEM CAUSE COUNTERMEASURE
1 Control board malfunction Contact your local Johnson Controls Service Ofce.