FORM 155.32-ICOM2.EN.UL
SECTION 8 – TROUBLESHOOTING
ISSUE DATE:1/10/2018
JOHNSON CONTROLS
161
SECTION 8 – TROUBLESHOOTING
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 correct the problem.
If the cause is not clear, using the countermeasure will not repair the problem. If the chiller-
heater has a serious malfunction, contact your local Johnson Controls Service Center
immediately.
If the chiller-heater stops because of a malfunction, wait until the chilled/hot water pump,
cooling water pump, and chiller-heater unit stop completely.
Several items should be checked routinely whenever the chiller-heater experiences any
trouble or abnormality.
• Causes of trouble on lighting indicator lamps on control panel of absorption chiller-
heater and countermeasures against them.
• Check to see if the main fuel gas valve was closed by mistake.
• 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 problem is not readily apparent.
NOTE: Check the causes in order. Any of the causes mentioned above will start 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 Re-
frigerant Blow Down and Diluting method.
NOTE: The time required for refinement of the refrigerant depends on the current load
condition. Constantly check the liquid level in the refrigerant tank while the refrigerant
is refined. If the refrigerant liquid level appears in the level gauge of the refrigerant
tank, close the valve immediately and completely.
Содержание YHAU-CGH
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