JOHNSON CONTROLS
172
FORM 155.32-ICOM1.EN.GB
ISSUE DATE: 10/13/2017
SECTION 8 – TROUBLESHOOTING
TABLE 54 -
INSUFFICIENT VACUUM LEVELS
Causes of insufficient vacuum level of the purge line
and countermeasure against it
ITEM
CAUSE
COUNTERMEASURE
1
Purge pump trouble
Contact your local Johnson Controls Service Office.
2
Deterioration of vacuum pump oil.
Replace the vacuum pump oil.
3
Wrong operation of purging line switching
when the vacuum pump capacity was
checked
• Confirm that the valve is open or closed.
4
Deterioration of the vacuum pump belt.
Contact your local Johnson Controls Service Office.
5
Leakage in purge pipe line.
6
Blocked or dysfunctional purge solenoid
valves
7
Check valve does not open.
8
Valve V21 mistakenly open
• Confirm that the valve is open or closed.
