Malfunctions; Show Last Malfunction; Malfunction Codes - Rotex GW-20 H12 Instrucciones De Instalación

8

MALFUNCTIONS

8.1

Show last malfunction

Use the key to switch the unit off, and press the
The red malfunction LED is lit continuously, and the latest fault code is shown flashing on the temperature display.
If the unit has never detected a locking malfunction, no code will be displayed.
The last locking malfunction can be deleted by briefly pressing the
8.2

Malfunction codes

If the malfunction LED is flashing, the boiler controller detects a fault. A malfunction code will be shown on the temperature display.
When the malfunction is rectified, the boiler controller can be restarted by pressing the reset
The following faults can be distinguished:
Temperature display Description
10, 11, 12, 13, 14 Sensor fault S1
20, 21, 22, 23, 24 Sensor fault S2
0 Sensor fault after self-check
1 Temperature too high
2 Switch S1 and S2
4 No flame signal
5 Poor flame signal
6 Flame detection error
8 Fan rpm is not correct
27 Short circuit outdoor sensor
29, 30 Gas valve controller fault
Only replace faulty parts with the original Rotex parts.
Failing to fit or incorrectly fitting the sensors S1 and/or S2 may lead to serious damage.
button.
button while pressing the
Possible cause/solution
•
Unit is off.
•
The flow switch is stuck (malfunction code 11). Clean or replace the flow switch.
•
Air in the installation. Purge the air from the boiler and CH installation.
•
Check the connection of ntc on the hot water tube.
•
Check wiring for break.
•
Replace S1.
•
Check wiring for break.
•
Replace S2.
•
Replace S1 and/or S2.
•
Air in installation. Purge the air from the boiler and CH installation.
•
Pump is not running. Insert a screwdriver into the slot of the pump shaft and turn
the shaft. Check the wiring between the pump and the boiler controller.
•
Too little flow in installation, closed radiators, pump setting too low.
•
Check cable harness.
•
Replace S1 or S2.
•
Main gas valve not opened.
•
Gas supply pressure too low, or disappears.
•
Condense output blocked.
•
Check ignition unit and ignition cable.
•
No or incorrect ignition distance.
•
Gas block or ignition unit is not receiving electrical current.
•
Check earthing.
•
Condense output blocked.
•
Gas supply pressure too low, or disappears.
•
Check ignition unit and ignition cable.
•
Check setting of gas block.
•
Check earthing.
•
Check air supply and gas output for possible recirculation of flue gases.
•
Replace ignition cable + spark plug.
•
Replace ignition unit.
•
Replace boiler controller.
•
Fan is coming up against cover insulation.
•
Wiring between fan and cover.
•
Check the wiring for faulty contact wire.
•
Check and/or replace fan.
•
Replace boiler controller.
•
Check the wiring of the outdoor sensor.
•
Replace outdoor sensor.
•
Boiler controller is not suitable for this application.
•
Replace boiler controller for the appropriate version.
•
Replace boiler controller.
button.
button.
45