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Diagnostics
Installation, use and maintenance manual – K18 Simplygas
51
8
8
DIAGNOSTICS
8.1
BOARD CODES
Table 8.1
Informative codes
Code
Description
Info (I)
405
Outdoor temperature exceeding operational limits
The code is reset automatically when the triggering condition ceases.
406
Outdoor temperature below operational limits
The code is reset automatically when the triggering condition ceases.
430
Generator protection cycle activated
The event indicates the activation of the protection cycle in case of high flue
temperature.
435
Gas valve antifreeze function activated
It is activated when the anti icing cycle starts and it is stopped when the anti icing
cycle ends.
452
Defrosting cycle activated
The code clears automatically when execution of defrosting ends.
457
Generator anti condensation cycle activated
The anti-condensation cycle ensures that once the flame is turned on, it stays on
until the conditions that guarantee the absence of condensation occur.
458
Service request filtering activation
The message appears when there are too frequent requests for activation, and so
the appliance establishes a minimum turn-on and turn-off time before switching
off or on again.
459
Possible flue obstruction
The control informs that, after flame ignition , the temperature measured by the
flue probe is not the expected one; this could be due to a possible flue discharge
duct obstruction.
462
Pre-ignition phase
The event indicates that the unit is performing the pre-ignition cycle.
479
Heating antifreeze function activated
The code clears automatically when antifreeze function execution ends.
Table 8.2
Operative codes
Code
Description
Warning (u)
Error (E)
401
Limit thermostat trip
NA
Contact the TAC.
402
Flue gas thermostat trip
Contact the TAC.
407
High generator temperature
Reset is automatic when the triggering condi-
tion ceases.
The reset may be done following one of procedures shown in Para-
graph 6.7.3
If the code persists, shows up again or in case of doubt, contact the
TAC.
408
Flame controller error
NA
Contact the TAC.
410
Low hot water flow
Reset is automatic when the triggering condi-
tion ceases.
Check and clean water filters on the system.
Check for air in the system.
Check water flow pump.
Power cycle the appliance.
The reset may be done following one of procedures shown in Para-
graph 6.7.3
If the code persists, shows up again or in case of doubt, contact the
TAC.
411
Insufficient rotation of oil pump
Reset occurs automatically 20 minutes after the
code is generated.
The reset may be done following one of procedures shown in Para-
graph 6.7.3
If the code persists, shows up again or in case of doubt, contact the
TAC.
412
Flame controller lockout
Reset is automatic up to 4 attempts (in about 5
minutes).
Check gas supply.
If the code persists or in case of doubt, contact the TAC.
The reset may be done following one of procedures shown in Para-
graph 6.7.3
413
Flame controller communica-
tion error
Reset is automatic when the triggering condi-
tion ceases.
The reset may be done following one of procedures shown in Para-
graph 6.7.3
If the code persists, shows up again or in case of doubt, contact the
TAC.
414
Flame controller not compa-
tible
NA
Contact the TAC.
415
Flame controller parameters
error
NA
Contact the TAC.
416
Hot water delivery temperature
probe fault
NA
The reset may be done following one of procedures shown in Para-
graph 6.7.3
If the code persists, shows up again or in case of doubt, contact the
TAC.
417
Hot water inlet temperature
probe fault
NA
The reset may be done following one of procedures shown in Para-
graph 6.7.3
If the code persists, shows up again or in case of doubt, contact the
TAC.