Instruction Manual

0020085231_02 - 05/10 - Glow-worm
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15.2 Fault memory
• This menu allows you to display the 10 most recent failure
codes registered by the appliance.
• In order to display the fault code memory, simultaneously
press the buttons
and under the symbol for more
than 7 seconds.
• The screen will display the rst fault "01" (record) and "F.XX"
(fault code).
• To display the other faults registered by the appliance, press
the button
or under the symbol .
• Press button
for more than 3 seconds to exit this
menu.
Record Fault code Description
01 XX Consult the “Fault codes” chapter.
02 XX Consult the “Fault codes” chapter.
03 XX Consult the “Fault codes” chapter.
04 XX Consult the “Fault codes” chapter.
05 XX Consult the “Fault codes” chapter.
06 XX Consult the “Fault codes” chapter.
07 XX Consult the “Fault codes” chapter.
08 XX Consult the “Fault codes” chapter.
09 XX Consult the “Fault codes” chapter.
10 XX Consult the “Fault codes” chapter.
• To erase the fault memory registered by the appliance,
consult the “Installation adjustments” chapter and use code
“d.94”.
15.3 Fault codes
i
The faults described in this chapter should be
carried out by a qualied engineer and if needed by
the After Sales Service.
Fault
codes
Description Cause Solution
F00 Flow heating temperature sensor fault Sensor open circuit
• Check the sensor’s connections.
• Check the wiring harness.
• Check the sensor.
F01 Return heating temperature sensor fault
Return heating temperature sensor
disconnected
F10 Flow heating temperature sensor fault Sensor short-circuit
F11 Return heating temperature sensor fault
Return heating temperature sensor
shorted.
F20 Overheating fault
Overheating safety device activated
(97°C)
• Check the operation of the pump.
• Check the wiring harness.
• Check that the ow and return heating isolation
valves are open.
F22 Water pressure of the installation (<0.3 bar)
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.
F23
Maximum temperature difference reached
between return and ow heating
Water circulation fault
• Check the ow and return heating sensor
connection.
• Check the pump speed.
F24 Water circulation fault
Malfunction of the pump (excessively
rapid temperature increase)
• Check that the ow and return heating isolation
valves are open.
MAINTENANCE