Manitowoc UG Series, Technician'S Handbook

Page: 79 / 128

Part Number: 040006847 12/19 79
4. Compare the temperature of the inlet of the hot gas
valve to the temperature of the compressor discharge
line.
Findings Comments
The inlet of the hot
gas valve is cool
enough to touch
and the compressor
discharge line is hot.
This is normal as the discharge line
should always be too hot to touch and
the harvest valve inlet, although too hot
to touch during harvest, should be cool
enough to touch after 5 minutes into the
freeze cycle.
The inlet of the hot
gas valve is hot and
approaches the
temperature of a hot
compressor discharge
line.
This is an indication something is wrong,
as the harvest valve inlet did not cool
down during the freeze cycle. If the
compressor dome is also entirely hot,
the problem is not a harvest valve
leaking, but rather something causing the
compressor (and the entire ice machine)
to get hot.
Both the inlet of the
hot gas valve and the
compressor discharge
line are cool enough
to touch.
This is an indication that something is
wrong, causing the compressor discharge
line to be cool to the touch. This is not
caused by a harvest valve leaking.