Table 31 - Alarm List - York EX Series Installation, Operation & Maintenance Instructions Manual

SECTION 6 – OPERATION
TABLE 20 - FAILURE LIST (CONT'D)
OPERATION
FAILURE
AT FAILURE
NAME
OCCURRENCE
Control Sensor Stop after
Abnormal dilution
Stop after
CPU Abnormal
dilution
Solution
Pump Inverter Stop without
Abnormal dilution
(Option)
Alarm
When an alarm occurs, an audible alarm does NOT
sound (buzzer). The type of alarm lights up in the
Alarm section of the screen. To view the details of the
alarm and the remedy, press the lighted button (the
name of the alarm).
After fixing the alarm, press the ALARM RESET but-
ton to reset the lighted alarm button. If you press the
ALARM RESET button before fixing the alarm, the
lit alarm button will not go out.

TABLE 31 - ALARM LIST

ALARM NAME
Purge frequency within a set time exceeded
Abnormal Purge its defined value, therefore chiller-heater is
Frequency suspected of poor air-tightness, etc.
Alarm is reset via alarm reset.
Purge switch was not turned OFF while
Purge Abnormal automatic purge operation.
Alarm is reset via alarm reset.
Low chilled water outlet temperature
during dilution operation, and then dilution
operation was interrupted (cooling water
Chilled Water
pump, solution pump, and refrigerant pump
Overcool Prevention
operations were suspended). The dilution
operation resumes when the chilled water
outlet temperature rises.
Low refrigerant temperature during
dilution operation, and then the dilution
operation was interrupted (cooling water
Refrigerant
pump, solution pump, and refrigerant
Overcool Prevention
pump operations were suspended). The
dilution operation is resumed if refrigerant
temperature rises up.
112
CAUSE
Temperature sensor and/
or pressure sensor detected
abnormal value due to
disconnection, short circuit,
etc.
CPU was judged to be
abnormal.
Solution pump inverter
protection function was
activated, and the inverter
output was suspended.
CAUSE OF ALARM AND
CONDITION TO RESET
COUNTER MEASURES
• Tighten terminal in control panel.
• Contact your local Johnson Controls Service Center.
Contact your local Johnson Controls Service Center.
• Check indication of inverter alarm code.
• Contact your local Johnson Controls Service Center.
COUNTER MEASURES
• Purge manually (according to instructions in
SECTION 7- MAINTENANCE on Page 129).
• Contact your local Johnson Controls Service Center.
• Check the equipment in cooling load line.
• Check the chilled water flow.
• Check the chilled water flow control system.
FORM 155.32-ICOM1.EN.GB
ISSUE DATE: 10/13/2017
JOHNSON CONTROLS