York EX Series Installation, Operation & Maintenance Instructions Manual page 111

FORM 155.32-ICOM1.EN.GB
ISSUE DATE: 10/13/2017
TABLE 20 - FAILURE LIST (CONT'D)
OPERATION
FAILURE
AT FAILURE
NAME
OCCURRENCE
Emergency
Stop without
Failure
dilution
Interlock
Low Cooling
Stop after
Water Inlet
dilution
Temperature
Cooling Water
Stop without
Suspension
dilution
(Option)
HG High
Temperature
HG High
Pressure
High Cut
High
Exhaust Gas
Temperature Stop after
dilution
Flame Failure
Fuel Line
Abnormal
HG Low Liquid
Level
Solution
Circulation
Pump
Abnormal
Solution Stop without
Spray Pump dilution
Abnormal
Refrigerant
Pump
Abnormal
Burner Fan
Abnormal Stop after
or Oil Pump dilution
Abnormal
JOHNSON CONTROLS
CAUSE
Emergency failure interlock
was not established.
Cooling water inlet temperature
had been kept at its lower
limit or lower for 30 minutes or
longer during cooling operation
Cooling water suspension
detected continuously during
solution pump automatic
operation while cooling
operation.
HG solution temperature rose
up abnormally
HG pressure rose up
abnormally
HG high pressure relay or
exhaust gas high temperature
relay was activated.
Exhaust gas temperature at
HG outlet rose up abnormally.
Flame signal was not detected
during operation, and then
protect relay (burner controller)
was locked out
Abnormal fuel gas (gas-fired)
or oil (oil-fired) pressure was
detected during combustion.
HG low liquid level had been
detected continuously during
combustion.
Solution circulation pump
thermal relay, or overheat
switch was activated.
Solution spray pump thermal
relay, or overheat switch was
activated.
Refrigerant pump thermal
relay, or overheat switch was
activated.
Burner fan thermal relay was
activated.
COUNTER MEASURES
Check equipment connected as emergency failure
interlock components.
Check the cooling water inlet temperature control
system
• Check the cooling water pump.
• Check the cooling water line.
• Check the cooling water flow.
• Check the cooling water suspension relay.
• Check whether or not the pipe is clogged.
• Check the cooling water line.
• Check the cooling water flow rate.
• Check the cooling tower.
• Purge manually (according to instructions in
SECTION 7- MAINTENANCE on Page 129).
Contact your local Johnson Controls Service Center.
Contact your local Johnson Controls Service Center.
Check if gas supply pressure is within acceptable
range.
• Purge manually (according to instructions in
SECTION 7- MAINTENANCE on Page 129).
• Contact your local Johnson Controls Service Center.
Contact your local Johnson Controls Service Center.
SECTION 6 – OPERATION
111
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