Glow-worm Ultracom 2 24cxi User Manual

Supplied By www.heating spares.co Tel. 0161 620 6677
0020085231_02 - 05/10 - Glow-worm
- 35 -
Fault
codes
Description Cause Solution
F26 Fault in gas valve motor. Disconnected or defective cables
• Check the gas valve connections.
• Check the operation of the gas valve.
• Check the operation of the condensate pump (option).
F27 Flame detection fault. Abnormal ame detection
• Check the ame detection electrode.
• Check the main board.
• Check the igniter unit.
F28 Ignition fault
No return gas / Insufcient gas ow
Gas valve incorrectly adjusted
Defective ring electrode and ame
control / Defective igniter unit
• Check the return gas circuit (gas valve open).
• Check the observe the ame picture and check
the CO
2
setting.
• Check the igniter unit connections.
• Check the state of the electrode (corrosion).
F29 Loss of ame during operation
F32 Incorrect air pressure Incorrect fan speed.
• Check the entire ue system.
• Check the fan’s electrical connections.
F49 EBUS voltage fault
Fault in EBUS line
Short circuit in EBUS connector
• Check that the eBus controls are tted and wired
correctly.
F61
Fault in the main board
Gas valve command fault
• Check the main boards connections.
• Check the main board.
• Check the appliance DSN number is correct.
• Reset the appliance.
F62 Gas valve closure fault
F63 Fault in the main board memory
F64
Rapid uctuation of return or ow
heating sensor.
F65 Excessive main board temperature
F67 Flame signal fault in the main board
F68 Fluctuation of ame signal
No return gas / Insufcient gas ow
Gas valve incorrectly adjusted
Defective ring electrode and ame
control / Defective igniter unit
• Check the return gas circuit (gas valve open).
• Check the observe the ame picture and check
the CO
2
setting.
• Check the igniter unit connections.
• Check the state of the electrode (corrosion).
F70
User interface incompatible with the main
board
Incorrect product code
• 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.
F71 Flow heating temperature sensor fault
Flow heating temperature sensor
unclipped or defective (no
temperature variation)
• Check the sensor connections.
• Make sure that the sensor is clipped to the tube.
F72
Permanent temperature difference between
ow and return heating sensors
Mismatch between the ow and return
heating temperatures (permanent
difference)
• Check temperature sensors connections.
• Replace faulty sensors.
F73 Heating circuit pressure sensor fault The sensor is shorted or disconnected.
• Check the sensor’s connections.
• Check the sensor.
F74 Heating circuit pressure sensor fault Fault in pressure sensor
F76 Thermal fuse fault
Thermal fuse disconnected
Defective thermal fuse
• Check the fuses connections.
• Replace the heat exchanger.
F77 Fault in gas valve motor.
Defective gas valve.
Defective condensate pump (option)
• Check the gas valve connections.
• Check the operation of the gas valve.
• Check the operation of the condensate pump (option).
F83
No water in the installation : the temperature
does not increase when the burner is lit
Return water valve closed
Pump disconnected
Leak in the installation
• Fill the installation.
• Purge the installation.
• Check the pump connections.
• Check the ow and return heating sensor
connections.
• Check that there are no leaks.
F84
Permanent temperature difference between
ow and return heating sensors
Inverted or disconnected ow and
return heating temperature sensors
Defective temperature sensors
• Check temperature sensors connections.
• Replace faulty sensors.
F85 Flow and return heating sensors fault
Flow and return heating temperature
sensor connected to same tube
• Check temperature sensors connections.
F86 Underoor heating contact fault
Floor heating contact open
Sensor disconnected or defective
• Check the sensor connections.
• Check that the sensor is connected to the main
board and the shunt is removed.
Err User interface fault Defective user interface
• Check connection from user interface PCB to main
PCB.
• Replace user interface.
MAINTENANCE

Glow-worm Ultracom 2 24cxi Specifications

General

Model	Ultracom 2 24cxi
Category	Boiler
Central Heating Output	24kW
Mounting	Wall-mounted
ERP Rating	A
DHW Output	24kW
Heating Flow Temperature Range	30-80°C
DHW Flow Rate at 40°C Rise	8.6 l/min
DHW Flow Rate at 50°C Rise	6.9 l/min
Warranty	2 years
Expansion Vessel	8 liters
Type	Combi Boiler