8 Diagnostics
Installation, Use and Maintenance Manual – GAHP-A
37
CODES
DESCRIPTION
Warning (u)
Error (E)
411
INSUFFICIENT ROTATION OF OIL
PUMP
Reset occurs automatically 20 minutes after the
code is generated.
Reset may be performed from the DDC/CCI or from the S61 board
(menu 2, parameter 21).
If the code persists, shows up again or in case of doubt, contact
the TAC.
412
FLAME CONTROLLER UNIT ARREST
Reset is automatic up to 4 attempts (in about 5
minutes).
Gas supply check.
Reset may be performed from the DDC/CCI or from the S61 board
(menu 2, parameter 20).
If the code persists or in case of doubt, contact the TAC.
416
FAULTY HOT OUTLET WATER TEM-
PERATURE PROBE
NA
Reset may be performed from the DDC/CCI or from the S61 board
(menu 2, parameter 21).
If the code persists, shows up again or in case of doubt, contact
the TAC.
417
FAULTY HOT OUTLET WATER
INLET TEMPERATURE PROBE
NA
Reset may be performed from the DDC/CCI or from the S61 board
(menu 2, parameter 21).
If the code persists, shows up again or in case of doubt, contact
the TAC.
420
FAULTY GENERATOR TEMPERATURE
PROBE
NA
Reset may be performed from the DDC/CCI or from the S61 board
(menu 2, parameter 21).
If the code persists, shows up again or in case of doubt, contact
the TAC.
422
FAULTY WATER FLOWMETER
NA
Reset may be performed from the DDC/CCI or from the S61 board
(menu 2, parameter 21).
If the code persists, shows up again or in case of doubt, contact
the TAC.
423
FAULTY AIR/GAS MIXTURE TEM-
PERATURE PROBE
NA
Reset may be performed from the DDC/CCI or from the S61 board
(menu 2, parameter 21).
If the code persists, shows up again or in case of doubt, contact
the TAC.
424
FUMES TEMPERATURE SENSOR
FAULT
Reset is automatic when the triggering condition
ceases.
Reset may be performed from the DDC/CCI or from the S61 board
(menu 2, parameter 21).
If the code persists, shows up again or in case of doubt, contact
the TAC.
425
CONDENSATE DISCHARGE
CLOGGED
NA
Check and clean condensate discharge.
Reset may be performed from the DDC/CCI or from the S61 board
(menu 2, parameter 21).
If the code persists, shows up again or in case of doubt, contact
the TAC.
426
GENERATOR FIN TEMPERATURE
SENSOR MALFUNCTION
Reset is automatic when the triggering condition
ceases.
Reset may be performed from the DDC/CCI or from the S61 board
(menu 2, parameter 21).
If the code persists, shows up again or in case of doubt, contact
the TAC.
428
GAS SOLENOID VALVE EXCITED
DURING FLAME CONTROLLER
ARREST
NA
Power off the appliance.
Contact authorised Technical Assistance.
429
GAS SOLENOID VALVE WITHOUT
ELECTRICAL POWER
Reset occurs automatically if the gas solenoid
valve switches on again within 10 minutes (with
central flame control unit on).
Reset may be performed from the DDC/CCI or from the S61 board
(menu 2, parameter 21).
If the code persists, shows up again or in case of doubt, contact
the TAC.
430
GENERATOR FINS TEMPERATURE
HIGH
Reset is automatic when the triggering condition
ceases.
Reset may be performed from the DDC/CCI or from the S61 board
(menu 2, parameter 21).
If the code persists, shows up again or in case of doubt, contact
the TAC.
431
WATER TEMPERATURE EXCEEDING
OPERATIVE LIMITS
Check configuration of other heat generators on
the system.
Check water flow.
Check system thermal load.
Reset is automatic when the triggering condition
ceases.
NA
434
POSSIBLE SOURCE ANOMALY
Check if the fan is rotating freely. Contact the TAC. NA
436
BLOWER FAULT
Reset occurs automatically 20 minutes after the
code is generated.
Reset may be performed from the DDC/CCI or from the S61 board
(menu 2, parameter 21).
If the code persists, shows up again or in case of doubt, contact
the TAC.
437
LOW AIR-GAS MIXTURE
TEMPERATURE
NA
Reset is automatic when the triggering condition ceases.
444
FAULTY EVAPORATOR TEMPERA-
TURE PROBE
NA
Reset may be performed from the DDC/CCI or from the S61 board
(menu 2, parameter 21).
If the code persists, shows up again or in case of doubt, contact
the TAC.
446
HIGH HOT INLET WATER
TEMPERATURE
Check configuration of other heat generators on
the system.
Reset is automatic and occurs if the generating
condition ceases with circulating pump on or 20
minutes after the code is generated with circulat-
ing pump off.
NA
447
HOT INLET WATER TEMPERATURE
LOWER THAN OPERATIVE LIMITS
Reset occurs automatically when the generating
cause resolves or 430 seconds after the code is
generated.
Reset occurs automatically when the condition that generated the
code ceases.
If the code shows up again or in case of doubt contact the TAC.
448
HIGH HOT WATER DIFFERENTIAL
TEMPERATURE
Check water flow.
Reset occurs automatically 20 minutes after the
code is generated.
Reset occurs automatically when the condition that generated the
code ceases.
If the code shows up again or in case of doubt contact the TAC.