York YHAU-CL Series User Manual

JOHNSON CONTROLS
162
FORM 155.30-ICOM2.EN.UL
ISSUE DATE: 12/21/2018
SECTION 8 – TROUBLESHOOTING
INSUFFICIENT VACUUM LEVELS
Causes of insufficient vacuum level of purging line and
countermeasures against them.
TABLE 47 - INSUFFICIENT VACUUM LEVELS
ITEM CAUSE COUNTERMEASURE
1 Purge pump trouble Contact your local Johnson Controls Service Ofce.
2 Deterioration of vacuum pump oil Replace the vacuum pump oil.
3
Wrong operation of purging line switching when
vacuum pump capacity was checked
See Purge Procedure on page 130. Conrm the valves
are open or closed.
4 Deterioration of vacuum pump belt
Contact your local Johnson Controls Service Ofce.
5 Leakage in purge pipe line
6 Blocked or dysfunctional purge solenoids
7 Check valve does not open
8 Valve V21 mistakenly open
See Purge Procedure on page 130. Conrm the valves
are open or closed.
ACTIONS TO TAKE AGAINST POWER
FAILURE
If the main power fails, follow the steps in the flow-
chart shown Figure 67 on page 163 and Figure 68 on
page 164.

York YHAU-CL Series Specifications

General

Brand	York
Model	YHAU-CL Series
Category	Chiller
Language	English