P2_PANTHER_user manual_ work basis_EN_03 - 07/11 - Protherm
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Code
Description
F24
Low water level: rapid temperature rise
F25
High
fl
ow temperature
F26
Incorrect
fl
ow value from stepmotor gas valve
F27
Flame sensing error – ionisation signal contrary to closed gas valve
F28
Failure to light burner at
fi
rst attempt
F29
Loss of
fl
ame during burner operation
F30
Failure of lock-out sensor
F31
Short circuit in lock-out sensor
F32
Anti-freeze protection valve is active: ventilator rotations are outside tolerance limits
F33
Anti-freeze protection valve is active: Pressure sensor is not on
Pressure sensor is not off (when the ventilator is not running)
F35
Flue system error
F36
Draft detected (chimney version only)
F37
Ventilator rpms during operation are outside tolerance limits
F38
Measured frequency limit is outside tolerance limits
F39
Error in boiler auto-detection
F41
Incorrect gas regulation
F42
Problem with coding resistor
F43
Incorrect value for boiler variant
F49
Low eBus voltage
F55
Error in CO sensor
F58
No feedback from preheater
F60
Error gas valve +
F61
Error gas valve -
F62
Error – gas valve turned off
F63
EEPROM error
F64
ADC error
F65
High electronics temperature
F66
Error in IIC collectors
F67
Flame signal from ASIC is unreliable
Detected
fl
ame input signal is outside range (0 or 5V)
F70
Incorrect DSN
F71
Flow sensor permanent failure
F72
Lengthy interval between
fl
ow sensor and NTC CH return water sensor
F73
CH pressure sensor not connected or short circuited
F74
CH pressure sensor has electrical fault (or damaged cable)
