JOHNSON CONTROLS
121
SECTION 8 – TROUBLESHOOTING
FORM 155.35-ICOM2.EN.CE/GB (1018)
DATE: 10/30/2018
8
TABLE 37 -
OTHER FAILURE TROUBLESHOOTING
ITEM
CAUSE
COUNTERMEASURE
1
The HG (XG) solution level dropped. The
solution level of the HG (XG) decreased
when the waste exhaust gas was
introduced.
• See
Performance Check Method of Vacuum Pump on page
• Contact your local Johnson Control Service Center.
2
The cooling water inlet temperature
dropped. The cooling water inlet
temperature dropped for 30 minutes or
more during operation in cooling mode.
Check the cooling water inlet temperature control system.
3
The exhaust gas inlet pressure rose. The
exhaust gas inlet pressure of HG (XG)
rose to the set value.
Contact your local Johnson Control Service Center.
4
The chilled / hot water flow suspension
was detected continuously during
solution pump operation.
• Check chilled / hot water pump.
• Check chilled / hot water line.
• Check chilled / hot water flow rate.
• Check chilled / hot water suspension relay.
• Check whether or not the connection pipe is clogged.
5
The hot water outlet temperature rose
suddenly or too high during heating
operation.
• Check equipment in heating load line.
• Check chilled / hot water low rate.
• Check chilled / hot water flow rate control system.
• Contact your local Johnson Control Service Center.
6
The HG (XG) pressure rose abnormally.
• Check cooling water line.
• Check cooling water flow rate.
• Check cooling tower performance.
• See
Performance Check Method of Vacuum Pump on page
• Contact your local Johnson Control Service Center.
7
HG (XG) solution temperature rose
abnormally.
8
The HG (XG) solution temperature rose
and exceeded its setting value while
the engine operates and the absorption
chiller-heater is stopped.
• Contact your local Johnson Control Service Center.
Waste exhaust gas leak is a serious failure.
If the gas engine continues to operate under
these conditions, serious problems could de-
velop and cause crystallization of solution in
the chiller-heater and/or damage of HG (XG)
tubes. Stop the gas engine immediately!
9
Abnormal condition of CPU in control
panel was detected.
Contact your local Johnson Controls Service Center.
10
The air damper motor coil overheats.
11
The air purge blower shows an
overcurrent.
The motor operation current is above
rated value.