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Part Number: 000015431 Rev 02 6/20 115
Analyzing Freeze Cycle Suction Line Temperature
Suction line temperature alone cannot diagnose an ice
machine. However, comparing this temperature during the
freeze cycle can help diagnose an ice machine malfunction.
The actual temperature of the suction line varies by model,
and will change throughout the freeze cycle. This makes
documenting the “normal” suction line temperature
difficult. The key to the diagnosis is observing the
compressor suction line temperature during the last three
minutes of the freeze cycle.
1. Navigate to Service/Diagnostics/Temperature Sensors
and view T3 & T4 Thermistors.
2. Monitor the suction line temperature during the last
three minutes of the freeze cycle and record the low
event.
3. Verify refrigerant amount is correct by weight when
recovering refrigerant and replacing a TXV. Grossly
overcharged QuietQube® ice machine in ambient
temperatures below 70°F will have a suction line
temperature below 10°F and liquid line subcooling
will be greater than 25°F.
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