York YHAU-CL Series - FIGURE 67 - Troubleshooting Sequence Flow Chart

JOHNSON CONTROLS
163
SECTION 8 – TROUBLESHOOTING
FORM 155.30-ICOM2.EN.UL
ISSUE DATE: 12/21/2018
8
Emergency stop
Audible alarm
(buzzer) “ON”
Chilled
Water/ Refrigerant
overcooling
Dilution Finish
Failure indicator
light “ON”
• Chilled water time out
• Cooling water time out
• Chilled water suspension
• Chilled water overcooled
• Refrigerant overcooled
• Solution circulation pump abnormal
• Solution spray pump abnormal
• Refrigerant pump abnormal
1
1
Yes
Yes
No
No
No
Yes
Reset operation
(buzzer “OFF”)
External outlet
issues
No
Yes
Dilution time up
Yes
Stop with dilution
operation
Hot water pump stop
Hot water valve close
Dilution time increasing
Solution/Refrigerant
Pump stop
Dilution time stops
increasing
Solution/Refrigerant
Pump continue
Solution pump and
refrigerant pump stop
Chilled water/Cooling
water pump stop
Generator.
pressure low
A/H, FCU, stop
Dilution
operation more than
30 minutes.
No
Dilution time count
• Operation interlock
• Cooling water interlock
• Interlock monitored normally
• Hot water pump interlock
• Low cooling water inlet temp.
• Control sensor abnormal
• CPU abnormal
• High generator temperature
• High chiller pressure
• Cooling water suspension
FIGURE 67 - TROUBLESHOOTING SEQUENCE FLOW CHART