Glow-worm Ultracom2 sxi Installation And Servicing page 35

fault
Description
codes
F26 Fault in gas valve motor.
F27 Flame detection fault.
F28 Ignition fault
F29 Loss of flame during operation
F32 Incorrect air pressure
F49 EBUS voltage fault
F61
F62
F63
Fault in the main board
F64
F65
F67
F68 Fluctuation of flame signal
User interface incompatible with the main
F70
board
F71 Flow heating temperature sensor fault
Permanent temperature difference between
F72
flow and return heating sensors
F73 Heating circuit pressure sensor fault
F74 Heating circuit pressure sensor fault
F76 Thermal fuse fault
F77 Fault in gas valve motor.
No water in the installation : the temperature
F83
does not increase when the burner is lit
Permanent temperature difference between
F84
flow and return heating sensors
F85 Flow and return heating sensors fault
F86 Underfloor heating contact fault
Err User interface fault
0020112600_02 - 10/12 - Glow-worm
Cause
Disconnected or defective cables
Abnormal flame detection
No return gas / Insufficient gas flow
Gas valve incorrectly adjusted
Defective firing electrode and flame
control / Defective igniter unit
Incorrect fan speed.
Fault in EBUS line
Short circuit in EBUS connector
Gas valve command fault
Gas valve closure fault
Fault in the main board memory
Rapid fluctuation of return or flow
heating sensor.
Excessive main board temperature
Flame signal fault in the main board
No return gas / Insufficient gas flow
Gas valve incorrectly adjusted
Defective firing electrode and flame
control / Defective igniter unit
Incorrect product code
Flow heating temperature sensor
unclipped or defective (no
temperature variation)
Mismatch between the flow and return
heating temperatures (permanent
difference)
The sensor is shorted or disconnected.
Fault in pressure sensor
Thermal fuse disconnected
Defective thermal fuse
Defective gas valve.
Defective condensate pump (option)
Return water valve closed
Pump disconnected
Leak in the installation
Inverted or disconnected flow and
return heating temperature sensors
Defective temperature sensors
Flow and return heating temperature
sensor connected to same tube
Floor heating contact open
Sensor disconnected or defective
Defective user interface
MAINTENANCE
Solution
• Check the gas valve connections.
• Check the operation of the gas valve.
• Check the operation of the condensate pump (option).
• Check the flame detection electrode.
• Check the main board.
• Check the igniter unit.
• Check the return gas circuit (gas valve open).
• Check the observe the flame picture and check
the CO setting.
2
• Check the igniter unit connections.
• Check the state of the electrode (corrosion).
• Check the entire flue system.
• Check the fan's electrical connections.
• Check that the eBus controls are fitted and wired
correctly.
• Check the main boards connections.
• Check the main board.
• Check the appliance DSN number is correct.
• Reset the appliance.
• Check the return gas circuit (gas valve open).
• Check the observe the flame picture and check
the CO setting.
2
• Check the igniter unit connections.
• Check the state of the electrode (corrosion).
• Check that the appliance DSN code on the screen
matches the product code of the nameplate (in the
event of a fault and the appliance DSN does not
appear, consult menu.d.93 reserved for the code).
• Check the boards reference.
• Check the sensor connections.
• Make sure that the sensor is clipped to the tube.
• Check temperature sensors connections.
• Replace faulty sensors.
• Check the sensor's connections.
• Check the sensor.
• Check the fuses connections.
• Replace the heat exchanger.
• Check the gas valve connections.
• Check the operation of the gas valve.
• Check the operation of the condensate pump (option).
• Fill the installation.
• Purge the installation.
• Check the pump connections.
• Check the flow and return heating sensor
connections.
• Check that there are no leaks.
• Check temperature sensors connections.
• Replace faulty sensors.
• Check temperature sensors connections.
• Check the sensor connections.
• Check that the sensor is connected to the main
board and the shunt is removed.
• Check connection from user interface PCB to main
PCB.
• Replace user interface.
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