Alarms - Daikin UATYQ30ABAY1 Operation Manual

the mask displays the working hours of compressors 3 and 4.

2.10 Alarms

When an alarm is triggered, the red "Alarm" key is on and the alarm digital output is activated.
By pressing the "Alarm" key, the last alarm is displayed; the other active alarms can be scrolled with arrow keys.
This is an example of an alarm mask:
Each alarm is identified by a code "ALxx" and the alarm cause is described in the mask. To reset an active alarm,
press and hold for at least 2 seconds the "Alarm" key; if the alarm has been successfully reset, the alarm mask
disappears and, if no other alarms are active, the red "Alarm" key is switched OFF. An alarm can be reset only if the
condition that has activated the alarm is not present anymore.
The manual reset of an alarm must be done only after checking the alarm cause and solving the
problem that has activated the alarm.
The improper reset of an alarm can cause serious damages to the unit or to its components.
On alarm history menu, last 150 alarms are stored. When the memory is full and another alarm is activated, the oldest
alarm is overwritten.
In the following, the full alarm list is reported with the main possible causes, some troubleshooting hints, the reset
mode, the action on the unit and on its components.
The alarm reset mode is reported on the "RESET" column:
• A = automatic: when the alarm condition disappears, the alarm is automatically reset;
• AC = automatic controlled: the alarm is automatically reset for a limited number of attempts in a certain time, after
that the reset becomes manual;
• M = manual reset from display or from supervisor: the alarm must be manually reset by display as described
above or by the supervisor reset variable; for each alarm with manual reset, the reset day and time are stored on
the alarm history.
In the "OFF UNIT" column, it is reported if the alarm stops the whole unit or not:
• Yes = the alarm stops the unit;
• No = the alarm does not stop the unit, but only the concerned devices
CODE DESCRIPTION
Overload Intervention of the thermal
AL01
Compressor 1 protection compressor 1
Overload Intervention of the thermal
AL02
Compressor 2 protection compressor 2
We reserve the right to make changes without any prior notice.
UATYQ*Y1
Packaged Rooftop
4P522681-1B
MAIN CAUSES CHECKS AND TROUBLESHOOTING
Check working conditions.
Check cabling, terminals and circuit
breaker of the motor.
Check adsorbed current.
Check compressor discharge
temperature.
Check working conditions.
Check cabling, terminals and circuit
breaker of the motor.
Check adsorbed current.
Check compressor discharge
temperature.
UNIT
RESET ITEMS OFF
OFF
M No Compressor 1
M No Compressor 2
Original instructions
Installation manual
15