P2_GEPARD_installer manual_ work basis_EN_02 - 03/10 - protherm
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MAINTENANCE
MAINTENANCE
Search and trouble-shooting 12
Diagnosing faults12.1
When displaying an error code the letter F will fl ash on the
display together with the relevant error code.
During the normal course of operation of the device the ten
most recent error alarms can be displayed by simultaneously
pressing for seven seconds both keys for setting the CH
temperature.
Fault codes12.2
i
Faults described in this chapter shall be removed by
a qualifi ed technician and if necessary after-sales
service.
Code Description
F0 Failure of NTC CH intake water temperature sensor
F1 Failure of NTC CH water return temperature sensor
F2 Failure of NTC HW sensor
F3 Failure of NTC accumulator
F4 Disruption of NTC collector
F5 Failure of air supply sensor
F6 Failure of draw sensor
F7 Disruption of NTC HW return from solar sensor
F8 Failure of NTC accumulator sensor ground
F9 Failure of NTC exhaust hood sensor
F10 Short circuit in NTC CH intake water temperature sensor
F11 Short circuit in NTC CH return water temperature sensor
F12
Short circuit in NTC accumulator sensor ground
Short circuit in NTC CH sensor
F13 Short circuit in NTC accumulator sensor
F14 Short circuit in NTC collector sensor
F15 Short circuit in air supply sensor
F16 Short circuit in draw sensor
F17 Short circuit in NTC HW return from solar sensor
F18 Short circuit in NTC accumulator sensor ground
F19 Short circuit in NTC exhaust hood sensor
F20 Safe temperature limiter is active: Cut off due to overheating
F21 Boiler locked out – threshold values exceeded
F22 Low water in boiler – pump locked out
F23
Low water level: high temperature difference between outlet
and inlet NTC
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
Code Description
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)
F75
Permanent failure CH pressure sensor. No rise in pressure
detected following pump start
F76 Thermal fuse failure in primary exchanger
F80 Error in SHE entry sensor
F81 Error in charger pump
F82 Error in anode tester
F90 Not connected to APC module
F91 Error in APC module sensor
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