SC No. Level Error Name/Error Condition/Major Cause/Solution
551-01 A Thermistor (edge) disconnection
Temperature of 0°C or lower is detected for 7 seconds
continuously.
Detection time: 10 or more
Measurement interval: 0.5 sec.
 Thermistor (edge) disconnection
 Thermistor (edge) not connected correctly
 Reconnect the thermistor (edge).
 Replace the thermistor (edge).
 Clear this SC by executing SP5-810-001.
SC No. Level Error Name/Error Condition/Major Cause/Solution
551-02 A Thermistor (edge) disconnection: Low voltage
 An error is detected only when the input voltage at power-on
is low.
 Temperature of 0°C or lower is detected for 25 seconds
continuously.
Detection time: 10 or more
Detection interval: 0.1 seconds
 Thermistor (edge) disconnection
 Thermistor (edge) not connected correctly
 Reconnect the thermistor (edge).
 Replace the thermistor (edge).
 Clear this SC by executing SP5-810-001.
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