York EX Series - FIGURE 67 - Troubleshooting Sequence Flow Chart

JOHNSON CONTROLS
173
SECTION 8 – TROUBLESHOOTING
FORM 155.32-ICOM1.EN.GB
ISSUE DATE: 10/13/2017
8
FIGURE 67 - TROUBLESHOOTING SEQUENCE FLOW CHART
Emergency stop
Audible alarm
(buzzer) “ON”
Dilution operation time
calculation
Chilled water
and/or refrigerant
temp. low cut-out
Dilution Finish
• 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
Failure indicator
light “ON”
1
1
Yes
Yes
No
No
No
Yes
Reset operation
(buzzer “OFF”)
External outlet
issues
No
Yes
Dilution operation
complete
Stop dilution
operation?
Yes
Damper fully closed
Burner stop
Dilution operation time
integration
Solution refrigerant
pump stop
Dilution operation time
integration stop
Solution and refrigerant
pump continue to
operate
Solution pump and
refrigerant pump stop
Chilled/hot water
cooling water pump
stop
HT- Gen.
pressure low
Air conditioner and
cooling tower fan stop
Dilution
operation more than
30 minutes.
No
• 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