Troubleshooting; Start; Operating - Cisco 3905 User Manual

3001736-EFC21-EFC25-UK

5. Troubleshooting

5.1 Start

Observation
Operating LED Alarm LED
Constant
RED
Flashing RED
Flashing GREEN
Flashing
YELLOW
Flashing RED, Flashing
GREEN or RED
YELLOW
No response No
response

5.2 Operating

Observation
Operating LED Alarm LED
Constant GREEN Constant
RED
Flashing GREEN Constant
RED
Type of fault
Power failure 1. Press the ON/OFF button twice or the external ON/
Safety monitoring 1. Check the wiring
fault 2. The PDS setting may be too low
(pressure switch) 3. Adjust the pressure switch setting
Unit fault 1. Check the isolation switch
2. Check the fan is running. If it is not running, check
3. Check that the flue, chimney and/or chimney fan are
4. Check the flow sensor in the chimney fan
5. Check settings and go through the commissioning
Air volume/Air inlet 1. Check the Air inlet is open
signal 2. Check the switch and wiring
3. If the installation does not have an Air inlet, check
Service mode Press the ON/OFF button
Check remote control Change battery
battery
Type of fault
Insufficient chimney 1. Press the ON/OFF button, or if the external ON/
draught, the correct
draught is being 2. Press the ON/OFF button or use the external ON/
established
Faulty chimney draught 1. Check the isolation switch
2. Check the fan is running. If it is not running, check
3. Check that the flue, chimney and/or chimney fan
4. Check the flow sensor in the chimney fan
5. Check settings and redo the commissioning again
Solution
OFF button to reset and start up
wiring to the fan and PDS
not blocked
again
that there is a jumper across terminals 10–11
Solution
OFF switch is in use, turn it OFF before resetting
OFF switch to restart
wiring to the fan
are not blocked
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