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Troubleshooting an “Err” message
1. Measured pressure was less than 10 psig.
• Refrigerant cylinder may be nearly empty.
• Valves may be closed.
2. Measured pressure was not within ±3psig of VSAT pressure on
the P-T chart.
• Thermocouple may not have been calibrated properly.
• Thermocouple may not have been attached properly to cylinder.
• Thermocouple may have not been connected to ODDB jack.
• Refrigerant cylinder pressure was unstable.
• Refrigerant cylinder temperature was unstable.
• Refrigerant selected did not match refrigerant in cylinder.
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