JOHNSON CONTROLS
119
SECTION 8 – TROUBLESHOOTING
FORM 155.35-ICOM2.EN.CE/GB (1018)
DATE: 10/30/2018
8
TABLE 33 -
INTERLOCK TROUBLESHOOTING
ITEM
CAUSE
COUNTERMEASURE
1
There is an interlock error. The error is caused by
the chilled / hot water pump operation answerback
signal, the air conditioner operation answerback
signal, the flue damper limit switch, and other error
messages.
• Check the interlocked devices.
• Check the equipment connected as elements for an
operation interlock failure.
• Check the signals from the interlocked devices.
• Check the signals from equipment connected as
elements for an operation interlock failure.
2
There an interlock error. The error is caused by a
cooling water pump answerback signal.
• Check the cooling water pump.
• Check the answerback signal from the cooling water
pump.
3
There is an external interlock error. The error is
caused by the seismoscope, high room temperature
signal, or other interfering barriers.
• Check the interlocked devices.
• Check the equipment connected as elements for a
constantly monitoring interlock failure.
• Check the signals from the interlocked devices.
• Check the signals from equipment connected as
elements for a constantly monitoring interlock failure.
4
There is an emergency interlock error. The error is
caused by the exhaust gas leak detector, or other
leaks.
• Check the interlocked devices.
• Check the equipment connected as elements for an
emergency failure interlock failure.
• Check the signals from interlocked devices.
• Check the signals from the equipment connected as
elements for an emergency failure interlock failure.
TABLE 34 -
PUMP TROUBLESHOOTING
ITEM
CAUSE
COUNTERMEASURE
1
The solution circulation pump shows an
overcurrent. The pump current value is above the
rated value.
Contact your local Johnson Controls Service Center.
2
The solution spray pump shows an overcurrent.
The pump current value above the rated value.
3
The refrigerant pump shows an overcurrent. The
pump operation current is over the rated value.
4
The solution circulation pump motor coil overheats.
5
The solution spray pump motor coil overheats.
6
The refrigerant pump motor coil overheats.