Troubleshooting/maintenance/repair/CO alarm |
13
11.2.2
Potential-free alarm contact
The illustration below explains the alarm contact's switching states.
Control terminals e.g. to connect an alarm signal
1
2
CO alarm — fault or voltage free
Operating ok
11.2.3
Behaviour in the event of a CO alarm and fault handling
The control unit distinguishes between two fault types, which are specified in more detail in the table below.
Table 11 Behaviour in the event of a CO alarm and faults
No.
Problem
Possible cause
Remedy / suggested solution
1
CO alarm
Critical CO concentration
reached
1. If the fan and control unit is installed in a garage
and your vehicle engine is idling, switch the engine
off.
2. Leave the room immediately and seek fresh air.
Check that everyone is present. Do not go back
into the room before it has been ventilated and the
CO alarm has stopped.
3. If the alarm triggers again after 24 hours, repeat
steps 1-2 and call the emergency gas services
(please check you have their number now) and if
necessary notify the relevant gas fitter.
2
Fault
- Fan failure
- Sensor fault
Contact Systemair
11.3 Maintenance
Warranty claims can only be made if maintenance work is carried out correctly and written evidence thereof is
provided.
We recommend regular maintenance intervals to ensure continuous fan operation. These maintenance intervals are
specified in the “Activities” table below. In addition, the operator must carry out follow-up activities such as cleaning,
replacing defective components or other corrective measures. For traceability reasons, a maintenance plan must be
created which documents the work carried out. This must be created by the operator. If the operating conditions are
"extreme", the maintenance intervals must be reduced so that maintenance is carried out more frequently. Examples
of extreme operating conditions:
• Durable ambient temperature > 30 ºC or < -10 ºC, or temperature fluctuations > 20 K
Table 12 Activities
Normal operating
conditions
Extreme operating
conditions
Activity
Every six
months
Annually
Quarterly
Every six
months
Check the fan and its components for visible damage,
corrosion and contamination.
X
X
Check the impeller for damage and imbalance.
X
X
Check the condensate drain is working correctly.
X
X
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