Figure 67 - Troubleshooting Sequence Flow Chart - York EX Series Installation, Operation & Maintenance Instructions Manual

FORM 155.32-ICOM1.EN.GB
ISSUE DATE: 10/13/2017
Emergency stop
Audible alarm
(buzzer) "ON"
Stop dilution
operation?
Reset operation
(buzzer "OFF")
Dilution operation time
calculation
Damper fully closed
Burner stop
1
Dilution operation time
integration
Chilled water
and/or refrigerant
temp. low cut-out
No
Dilution operation
complete
Yes
HT- Gen.
pressure low
Yes
Solution pump and
refrigerant pump stop
Chilled/hot water
cooling water pump

FIGURE 67 - TROUBLESHOOTING SEQUENCE FLOW CHART

JOHNSON CONTROLS
Failure indicator
light "ON"
No
Yes
• Operation interlock
• Cooling water pump interlock
• Constantly monitoring interlock
• Combustion monitoring interlock
• Low cooling water inlet temperature
• HG high temperature / high pressure
• High cut
• High exhaust gas temperature
• Flame failure
• Fuel line abnormal
• HG low liquid level
• Burner fan / Oil pump abnormal
• Control sensor abnormal
• CPU abnormal
Yes
Solution refrigerant
pump stop
No Solution and refrigerant
pump continue to
operate
No
operation more than
Dilution Finish
Air conditioner and
cooling tower fan stop
stop
External outlet
issues
Dilution operation time
integration stop
1
Dilution
No
30 minutes.
Yes
SECTION 8 – TROUBLESHOOTING
• Chilled/hot water suspension
• Chilled water overcooled
• High hot water temperature
• Emergency failure interlock.
• Cooling water suspension
(Option)
• Solution circulation pump
abnormal
• Solution spray pump
abnormal
• Refrigerant pump abnormal
• Solution pump inverter
abnormal
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