FORM 155.32-ICOM2.EN.UL
SECTION 6 – OPERATION
ISSUE DATE:1/10/2018
JOHNSON CONTROLS
109
If you press the
FAILURE RESET
button before fixing the problem, the lighted failure button will not go out, and the buzzer will
sound again.
Table 31 -
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 in start-
up mode.
• 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 in start-
up mode.
• 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.
Emergency Failure
Interlock
Stop without dilution
Emergency failure interlock
was not established.
Check equipment connected as emergency failure
interlock components.
