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 Ofce.
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
• See Purge Procedure on page 130
• Conrm that the valve is open or closed.
4 Deterioration of the vacuum pump belt.
Contact your local Johnson Controls Service Ofce.
5 Leakage in purge pipe line.
6 Blocked or dysfunctional purge solenoid
valves
7 Check valve does not open.
8 Valve V21 mistakenly open • See Purge Procedure on page 130
• Conrm that the valve is open or closed.
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