icetro IC-0170A, Руководство техника

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Final Analysis
H
ot Gas Valve Leaking
A leaking hot gas valve must be replaced.
Low Charge/TXV Starving
Normally, a starving expansion valve only affects the
freeze cycle pressures, not the harvest cycle pressures. A
low refrigerant charge normally affects both pressures.
Verify the ice machine is not low on charge before
replacing an expansion valve.
Add refrigerant charge in 2 oz. increments as a diagnostic
procedure to verify a low charge. (Do not add more than
the total charge of refrigerant). If the problem is
corrected, the ice machine is low on charge. Find the
refrigerant leak.
The ice machine must operate with the nameplate charge.
If the leak cannot be found, proper refrigerant procedures
must still be followed. Change the liquid line drier,
evacuate the system and weigh in the proper charge.
If the problem is not corrected by adding charge, the
expansion valve is faulty.
TXV Flooding
A loose or improperly mounted expansion valve bulb
causes the expansion valve to flood. Check bulb
mounting, insulation, etc., before changing the valve.
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