Maintenance, 3 fault codes – Glow-worm Ultracom2 cxi User Manual

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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 first 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

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

The faults described in this chapter should be

carried out by a qualified 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 flow 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 flow and return heating sensor

connections.

• Check that there are no leaks.

F23

Maximum temperature difference reached

between return and flow heating

Water circulation fault

• Check the flow and return heating sensor

connection.

• Check the pump speed.

F24

Water circulation fault

Malfunction of the pump (excessively

rapid temperature increase)

• Check that the flow and return heating isolation

valves are open.

MAINTENANCE