Vacuum Pump; Table 52 - Vacuum Pump Troubleshooting - York EX Series Installation, Operation & Maintenance Instructions Manual

SECTION 8 – TROUBLESHOOTING

VACUUM PUMP

When the Purge Abnormal Alarm lights, the vacuum
pump needs to be disassembled for inspection. Contact
your local Johnson Controls Service Center. When the
Abnormal Purge Frequency Alarm lights or the vacu-
um level of the purging line did not reach the speci-
fied level during the vacuum pump capacity check,
the whole of the purge line needs to be inspected. See
Table 42 on page 167.

TABLE 52 - VACUUM PUMP TROUBLESHOOTING

ITEM
1 Deterioration of vacuum pump oil
Wrong operation of purging line switching when
2
vacuum pump capacity was checked.
3
Deterioration of vacuum pump belt
4 Leakage in purge pipe lines.
5 Solenoid valve or check valve in the purge line is
clogged
170
CAUSE COUNTERMEASURE
Replace the vacuum pump oil.
• See Purge Procedure on page 130
• Confirm the valves are open or closed.
Contact your local Johnson Controls Service Center.
FORM 155.32-ICOM1.EN.GB
ISSUE DATE: 10/13/2017
JOHNSON CONTROLS