OPERATING CODES/TROUBLESHOOTING
1 OVERVIEW AND OPERATING CODES/TROUBLESHOOTING
Table 1 – TABLE OF OPERATING CODES generated by the S61 electronic board (firmware version 3.023)
CODES DESCRIPTION TRIP CONDITIONS RESET METHOD
E 400 FAULT ON RESET CIRCUIT OF FLAME
CONTROL UNIT Fault on reset circuit of flame control unit. Contact authorised Technical Assistance.
u 401 GENERATOR LIMIT TEMPERATURE
THERMOSTAT High temperature detected by limit thermostat
on body of generator Acknowledge the thermostat manually: reset will be automatic as
soon as fault condition is over.
E 401 GENERATOR LIMIT TEMPERATURE
THERMOSTAT u_01 code active for 1 hour, or u_01 code
generated 3 times in 2 hours of operation. Contact authorised Technical Assistance.
u 402 FUMES THERMOSTAT High temperature detected by exhaust fumes
thermostat Acknowledge the thermostat manually: reset will be automatic as
soon as fault condition is over.
E 402 FUMES THERMOSTAT u_02 code active for 1 hour, or u_02 code
generated 3 times in 2 hours of operation. Contact authorised Technical Assistance.
u 405 HIGH AMBIENT TEMPERATURE HIGH temperature detected by ambient
temperature sensor. Reset occurs automatically when the cause ceases or when the unit
is switched off.
u 406 LOW AMBIENT TEMPERATURE LOW temperature detected by ambient
temperature sensor. Reset occurs automatically when the cause ceases or when the unit
is switched off.
u 407 HIGH CONDENSER INLET
TEMPERATURE Temperature measured by condenser inlet sensor,
fumes sensor or generator fin sensor HIGH. Reset occurs automatically when the condition that generated the
code ceases.
E 407 HIGH CONDENSER INLET
TEMPERATURE u_07 code active for 1 hour, or u_07 code
generated 12 times in 2 hours of operation.
Carry out appropriate checks. Reset may be performed from the
controller (or from the S61 board via menu 2, parameter 21). If the
code persists, contact authorised Technical Assistance.
E 408 FLAME CONTROL UNIT ERROR E_12 on unit and condenser inlet temperature
increasing by over 10 °C within 1 hour.
Carry out appropriate checks. Reset may be performed from the
controller (or from the S61 board via menu 2, parameter 21). If the
code persists, contact authorised Technical Assistance.
u 410 INSUFFICIENT HOT WATER FLOW Insufficient water flow (the circulator is on and
the flowmeter measure a low water flow). Reset occurs automatically when correct water flow is restored.
E 410 INSUFFICIENT HOT WATER FLOW u_10 code is repeated, or code u_10 is active for
1 hour.
Reset may be performed from the controller (or from the S61 board
via menu 2, parameter 21). If the code persists, contact authorised
Technical Assistance.
u 411 INSUFFICIENT ROTATION OF OIL
PRESSURE PUMP Insufficient rotation of oil pressure pump. Reset occurs automatically 20 minutes after the Code is generated.
E 411 INSUFFICIENT ROTATION OF OIL
PRESSURE PUMP u_11 code generated twice in 2 hours of
operation.
Reset may be performed from the controller (or from the S61 board
via menu 2, parameter 21). If the code persists, contact authorised
Technical Assistance.
u 412 FLAME CONTROL UNIT ARREST Failure to ignite burner. Reset occurs automatically when the solenoid valve opens again
(new ignition attempt), or if the code persists for 5 minutes.
E 412 FLAME CONTROL UNIT ARREST Flame arrest signal. Reset may be performed from the controller (or from the S61 board
via menu 2, parameter 20). If the code persists, contact authorised
Technical Assistance.
E 416 HOT OUTLET WATER TEMPERATURE
SENSOR DEFECTIVE Fault (interruption or short circuit) on hot outlet
water temperature sensor.
Reset may be performed from the controller (or from the S61 board
via menu 2, parameter 21). If the code persists, contact authorised
Technical Assistance.
E 417 COLD INLET WATER TEMPERATURE
SENSOR DEFECTIVE Fault (interruption or short circuit) on inlet water
temperature sensor.
Reset may be performed from the controller (or from the S61 board
via menu 2, parameter 21). If the code persists, contact authorised
Technical Assistance.
E 420 CONDENSER INLET TEMPERATURE
SENSOR DEFECTIVE Fault (interruption or short circuit) on condenser
inlet temperature sensor.
Reset may be performed from the controller (or from the S61 board
via menu 2, parameter 21). If the code persists, contact authorised
Technical Assistance.
E 422 WATER FLOWMETER FAULT Water flowmeter fault Reset may be performed from the controller (or from the S61 board
via menu 2, parameter 21). If the code persists, contact authorised
Technical Assistance.
E 423 AIR/GAS MIXTURE SENSOR FAULT Air gas mixture sensor fault Reset may be performed from the controller (or from the S61 board
via menu 2, parameter 21). If the code persists, contact authorised
Technical Assistance.
E 424 FUMES TEMPERATURE SENSOR
FAULT Fumes temperature sensor fault Reset may be performed from the controller (or from the S61 board
via menu 2, parameter 21). If the code persists, contact authorised
Technical Assistance.
E 425 CONDENSATE DISCHARGE
CLOGGED Condensate discharge clogged Reset may be performed from the controller (or from the S61 board
via menu 2, parameter 21). If the code persists, contact authorised
Technical Assistance.
E 426 GENERATOR FIN TEMPERATURE
SENSOR Generator fin temperature sensor Reset may be performed from the controller (or from the S61 board
via menu 2, parameter 21). If the code persists, contact authorised
Technical Assistance.
E 428 GAS SOLENOID VALVE EXCITED
DURING FLAME CONTROLLER
ARREST
The flame controller is arrested (E_12) but the gas
solenoid valve is excited. In this case the flame
controller is de-excited (E_12 resets).
Reset may be performed from the controller (or from the S61 board
via menu 2, parameter 21). If the code persists, contact authorised
Technical Assistance.
u 429 GAS SOLENOID VALVE WITHOUT
ELECTRICAL POWER Gas solenoid valve is off for 5 seconds (with
central flame control unit on). Reset occurs automatically if the gas solenoid valve switches on
again within 10 minutes (with central flame control unit on).
E 429 GAS SOLENOID VALVE WITHOUT
ELECTRICAL POWER Code u_29 is active for more than 10 minutes
(with flame controller unit on).
Carry out appropriate checks. Reset may be performed from the
controller (or from the S61 board via menu 2, parameter 21). If the
code persists, contact authorised Technical Assistance.
u 436 BLOWER FAULT Blower fault Reset occurs automatically 20 minutes after the operating code is
generated.
