Alarms - Daikin Modular-Light AHU User Manual

2. Navigate through the different available states by pressing + or – buttons (Cool, Heat)
3. Confirm the change of state by pressing for at least 1 second the OK button
4. To return to the main screen page without taking any action, either press the Home button
or wait for 5 seconds
NOTE! When icon
on the main controller has been set on Auto during commissioning phase and Summer/Winter
cannot be changed via Room Unit.

3.5 Alarms

When the alarm icon
status and actual alarm code, the user must go to the alarm code screen page.
A long press of the OK button
the OK button will attempt to reset the alarm, if possible. Please contact your local Daikin service
representative if you need additional support.
The alarm code consists of four slots. The first two represents the alarm type, with the following meanings:
- FL -> Fault alarm (unit stops)
- OP -> Operation alarm (unit keeps running)
The other part of the string represents the numeric code of the alarm. For a complete list of alarm code,
check the following table:
Alarm Code Alarm String
OP01
Filter alarm
Air quality (CO
OP02
sensor alarm
FL04
Supply fan alarm
FL05
Return fan alarm
Heating/Cooling
FL06
Coils alarm
Heat Recovery freeze
FL07
alarm
Modular-Light AHU
appears on the Room Unit main screen, the Summer/Winter change source
appears on the interface, an alarm has occurred on the unit. In order to check unit
will get the user on the alarms code screen page. Another long press of
Description
Supply or Return filter dirty:
differential pressure switch of the filters detected an high pressure
difference pressure between input and output of the filter. Check filters
status.
CO percentage too high:
2
)
2
measured value of CO
the air quality sensor (not connected or broken).
Error condition on Supply fan:
Supply fan has detected a failure. Check fan status.
Error condition on Return fan:
Return fan has detected a failure. Check fan status.
Error condition on Heating/Cooling coils:
one or more heating/cooling coils have detected a failure. Check their
status.
Heat Recovery freeze alarm active:
unit heat recovery freeze protection has intervened to prevent damage
to the device and has turned off the unit. After a time period, the unit
will automatically reset the alarm and start again.
is out the allowable range or error condition on
2
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