ESIE98–06A Troubleshooting
Part 3 – Troubleshooting 3–35
33
4
5
1
Leak when heating
mode
The following list explains what the possible causes could be. The numbers in the columns refer to the
numbers in the drawing: page 3-31:
1 2 3 4 5 6 Description
Hot Cool Hot as
in
column 1
Cool as
in
column 1
Temperature
of valve
body
Warmer
than valve
body
At the end of the slide, the piston
needle is leaking. To resolve:
1 Operate the valve several
times.
2 Recheck.
3 If there is an excessive leak,
replace the valve.
Hot Cool Hot as
in
column 1
Cool as
in
column 1
Warmer than
valve body
Warmer
than valve
body
The piston needle and pilot nee-
dle are leaking. To resolve:
1 Operate the valve several
times.
2 Recheck.
3 If there is an excessive leak,
replace the valve.
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