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FORM 155.32-ICOM1.EN.GB
ISSUE DATE: 10/13/2017
If the chiller-heater has any problems or an abnormal
condition is detected while it operates, find the cause.
Use the procedures listed below to fix the problem.
If the cause is not clear, using the countermeasure can-
not repair the problem, or if the chiller-heater seems
to have a serious problem, contact your local Johnson
Controls Service Center immediately.
If the chiller-heater stops because of a problem, wait
until the chilled/hot water pump, cooling water pump,
and chiller-heater unit stop completely, then verify the
following items.
Causes of lighting of trouble indicator lamps on con-
trol panel of absorption chiller-heater and countermea-
sures against them.
Several items should be checked routinely whenever
the chiller-heater experiences any trouble or abnormal-
ity.
• Check to see if the main fuel gas valve was closed
by mistake.
JOHNSON CONTROLS
SECTION 8 – TROUBLESHOOTING
• Open the main valve.
• See if the valves of the chilled/hot system and
cooling water system are set correctly. Verify the
flow rate.
• See if the cooling tower is operating normally.
• Check the valves and pumps of the cooling water
system. Verify the flow rate.
Contact your local Johnson Controls Service Center if
any of the following apply:
• The water flow rate setting is unknown.
• It takes 30 minutes or more to restore operations.
• Solution is crystallized.
• The cause of the trouble is not readily apparent.
Check the causes in order. Any of these
causes will state the diluting operation
automatically then stop the chiller-heater.
Check that the diluting operation was
completed, and if not, dilute the solution
according to the Manual Refrigerant Blow
Down and Diluting Method on page 142 .
8
165
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Troubleshooting
