JOHNSON CONTROLS
110
FORM 155.32-ICOM1.EN.GB
ISSUE DATE: 10/13/2017
SECTION 6 – OPERATION
TABLE 30 -
FAILURE LIST
FAILURE
NAME
OPERATION
AT FAILURE
OCCURRENCE
CAUSE
COUNTER MEASURES
Chilled/Hot
Water Time
Out
Not start
Chilled/Hot water pump
operation interlock and/or the
chilled/hot water suspension
relay was not established
within a set time while start-up.
• Check the chilled/hot water pump.
• Check the chilled/hot water line.
• Check the chilled/hot water flow.
• Check the chilled/hot water suspension relay.
• Check whether or not the pipe is clogged.
Cooling Water
Time Out
Cooling water pump operation
interlock was not established
within a set time while start-up.
• 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.
Ignition Time
Out
Combustion signal was not
established within 3 minutes
after combustion command
output, due to malfunction
of air pressure switch and/or
control motor.
Contact your local Johnson Controls Service Center.
Ignition
Condition
Unsatisfied
Ignition condition, such as
shut-off valve fully-close limit
switch, was not established at
ignition command output.
• Check the fuel mode of burner and control panel.
• Contact your local Johnson Controls Service Center.
Operation
Interlock
Stop after
dilution
Operation interlock was not
established during solution
pump automatic operation.
Check interlocked equipment.
Cooling Water
Pump Interlock
Cooling water pump interlock
was not established during
cooling water pump operation
command output.
Check the cooling water pump interlock.
Chilled/
Hot Water
Suspension
Stop without
dilution
Chilled/Hot water flow
suspension had been detected
continuously during solution
pump automatic operation.
• Check the chilled/hot water pump.
• Check the chilled/hot water line.
• Check the chilled/hot water flow.
• Check the chilled/hot water suspension relay.
• Check whether or not the pipe is clogged.
Chilled Water
Overcooled or
High Hot Water
Temperature
Chilled water outlet
temperature was abnormally
low during cooling operation.
Hot water outlet temperature
rose abnormally during heating
operation
• Check equipment in cooling load line.
• Check the chilled/hot water flow.
• Check the chilled/hot water flow control system.
• Contact your local Johnson Controls Service Center.
Refrigerant
Overcooled
Low refrigerant temperature
during cooling operation, and
then refrigerant overcool relay
was activated
• Check the chilled water line.
• Check the chilled water flow.
• Contact your local Johnson Controls Service Center
Constantly
Monitoring
Interlock
Stop after
dilution
Constant monitoring interlock
was not established.
• Check the components of the constant monitoring
interlock.
• If any of the components are not working, contact
your local Johnson Controls Service Center.
Combustion
Monitoring
Interlock
Combustion monitoring
interlock was not established
during combustion.
• Check equipment connected as combustion
monitoring interlock components.
• Contact your local Johnson Controls Service Center.
