Technical data
82
9   OPERATING CODES/TROUBLESHOOTING
9.1   OVERVIEW AND OPERATING CODES/TROUBLESHOOTING
Table 9.1 – TABLE OF OPERATING CODES generated by the S61 electronic board (firmware version 3.024)
CODES DESCRIPTION TRIP CONDITIONS RESET METHOD
E 200
FAULT ON RESET CIRCUIT OF FLAME 
CONTROL UNIT
Fault on reset circuit of flame control unit. Contact authorised Technical Assistance.
u 201
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 201
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 202 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 202 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 203
COLD WATER ANTIFREEZE 
THERMOSTAT
Low temperature detected by cold outlet water 
sensor.
Reset occurs automatically when the condition that generated the 
code ceases, with hysteresis of 2 °C.
E 205 HIGH AMBIENT TEMPERATURE
HIGH temperature detected by ambient 
temperature sensor.
Reset occurs automatically when the condition that generated the 
code ceases.
u 206 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 207
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 207
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 
CCI/DDC (or from the S61 board via menu 2, parameter 1). If the 
code persists, contact authorised TAC.
E 208 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 
CCI/DDC (or from the S61 board via menu 2, parameter 1). If the 
code persists, contact authorised TAC.
u 210 INSUFFICIENT COLD WATER FLOW
Insufficient water flow (the circulator is on and 
the flowmeter is open).
Reset occurs automatically when correct water flow is restored.
E 210 INSUFFICIENT COLD WATER FLOW
u_10 code generated 5 times since appliance 
powered, or code u_10 is active for 1 hours.
Reset may be performed from the CCI/DDC (or from the S61 board 
via menu 2, parameter 1). If the code persists, contact authorised 
TAC.
u 211
INSUFFICIENT ROTATION OF OIL 
PRESSURE PUMP
Insufficient rotation of oil pressure pump. Reset occurs automatically 20 minutes after the Code is generated.
E 211
INSUFFICIENT ROTATION OF OIL 
PRESSURE PUMP
u_11 code generated twice in 2 hours of 
operation.
Reset may be performed from the CCI/DDC (or from the S61 board 
via menu 2, parameter 1). If the code persists, contact authorised 
TAC.
u 212 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 212 FLAME CONTROL UNIT ARREST Flame arrest signal.
Reset may be performed from the CCI/DDC (or from the S61 board 
via menu 2, parameter 0). If the code persists, contact authorised 
TAC.
E 216
COLD OUTLET WATER 
TEMPERATURE SENSOR DEFECTIVE
Fault (interruption or short circuit) on outlet water 
temperature sensor.
Reset may be performed from the CCI/DDC (or from the S61 board 
via menu 2, parameter 1). If the code persists, contact authorised 
TAC.
E 217
COLD INLET WATER TEMPERATURE 
SENSOR DEFECTIVE
Fault (interruption or short circuit) on condenser 
outlet temperature sensor.
Reset may be performed from the CCI/DDC (or from the S61 board 
via menu 2, parameter 1). If the code persists, contact authorised 
TAC.
E 220
CONDENSER INLET TEMPERATURE 
SENSOR DEFECTIVE
Fault (interruption or short circuit) on condenser 
inlet temperature sensor.
Reset may be performed from the CCI/DDC (or from the S61 board 
via menu 2, parameter 1). If the code persists, contact authorised 
TAC.
E 222 WATER FLOWMETER FAULT Water flowmeter fault.
Reset may be performed from the CCI/DDC (or from the S61 board 
via menu 2, parameter 1). If the code persists, contact authorised 
TAC.
E 223 AIR/GAS MIXTURE SENSOR FAULT Air gas mixture sensor fault.
Reset may be performed from the CCI/DDC (or from the S61 board 
via menu 2, parameter 1). If the code persists, contact authorised 
TAC.
E 224
FUMES TEMPERATURE SENSOR 
FAULT
Fumes temperature sensor fault
Reset may be performed from the CCI/DDC (or from the S61 board 
via menu 2, parameter 1). If the code persists, contact authorised 
TAC.
E 225
CONDENSATE DISCHARGE 
CLOGGED
Condensate discharge clogged 
Reset may be performed from the CCI/DDC (or from the S61 board 
via menu 2, parameter 1). If the code persists, contact authorised 
TAC.
E 226
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 228
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 CCI/DDC (or from the S61 board 
via menu 2, parameter 1). If the code persists, contact authorised 
TAC.
u 229
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 229
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 
CCI/DDC (or from the S61 board via menu 2, parameter 1). If the 
code persists, contact authorised TAC.










