JOHNSON CONTROLS
155
FORM 155.30-ICOM2.EN.UL
ISSUE DATE: 12/21/2018
8
SECTION 8 – TROUBLESHOOTING
If the chiller malfunctions or an abnormal condition is
detected while it operates, it is important to find the
cause.
If the cause is not clear, using the countermeasure will
not correct the problem, or if the chiller seems to have
a serious malfunction, contact your local Johnson Con-
trols Service Center immediately.
Causes of lighting of trouble indicator lamps on con-
trol panel of absorption chiller and countermeasures
against them.
Several items should be checked routinely whenever
the chiller experiences any trouble or abnormality.
If the chiller stops because of a malfunction, wait un-
til the chilled water pump, cooling water pump, and
chiller unit stop completely, then verify the following
items.
• Check to see if the main hot water valve was
closed by mistake.
• Open the main valve.
• See if the valves of the chilled water 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.
NOTE: Check the causes in order. Any
of these causes will start the diluting
operation automatically then stop the
chiller. Check that the diluting operation
was completed, and if not, dilute the solu-
tion according to the procedure shown