Motak PKM0335, Руководство по обслуживанию

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92 Part Number: 000016427 Rev 00 08/2020
Troubleshooting
FINAL ANALYSIS
The column with the highest number of check marks identifies the refrigeration problem.
Column 1 – Harvest Valve Leaking
A leaking harvest valve must be replaced.
Column 2 – 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. (57 g) 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.
Column 3 – 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.
Column 4 – Compressor
Replace the compressor and start components. To receive warranty credit, the compressor
ports must be properly sealed by crimping and soldering them closed. Old start
components must be returned with the faulty compressor.