Alarms And Malfunctions; General Troubleshooting - Daikin UATYA-BBY1 Installation, Use And Maintenance Manual

6.5 Alarms and malfunctions

Possible malfunctions will trigger the protective devices and safety devices of the unit before serious faults occur.
All the "warnings" and "alarms" are recorded in the memory of the control and displayed on the display of the unit.
Before resetting an alarm, the cause that triggered it must be found and eliminated.
An alarm going off repeatedly quickly leads to serious damage to the unit.
Unit filled with refrigerant classified as A2L (mildly flammable) A refrigerant leak alarm identifies the
potential formation of flammable atmospheres.
Refer to the manual of the control for the alarms and warnings that appear on the display of the unit.
In case of anomalies not handled by the control panel, refer to the following troubleshooting section.
This troubleshooting section does not include causes due to deliberate work or tampering or particularly serious
malfunctions, for which a thorough analysis is necessary.
6.5.1

General troubleshooting

SYMPTOM
The unit does not start, the display
is off.
The unit does not start, the display is
off, the control is powered correctly.
The unit does not start, the display is
off, the control is powered correctly
but the LEDs are not flashing.
The unit is operating normally, the
display is off.
The unit does not start, the display
is on.
Abnormal noises from the unit due to
vibrations.
Abnormal noises on the hydraulic
pipes.
Translation from original instructions
Packaged Rooftop
46
LIKELY CAUSE
No mains voltage.
No voltage to the auxiliary circuit.
The unit is switched off from
the display and the display is
disconnected or not working.
The control is not working.
The connection of the display to the
control is disconnected.
The display is not working.
There is no 230V auxiliary power
supply.
The weight of the unit is not
distributed evenly on the base.
Operation of the system pump
outside its performance curve with
excessive water flow rate.
Presence of air in the system.
POSSIBLE SOLUTION
Check that the main disconnect
switch is in the "ON" position.
Check for voltage in the power
supply line.
Check that the protective devices
upline and downline of the
transformer of the auxiliary circuit are
undamaged.
Reset the triggered protective device
after eliminating the cause that
triggered it
Restore the connection of the display
or replace it.
Replace the control.
Restore the connection between the
display and the control.
Replace the display.
Check that the secondary circuit of
the 230V transformer is intact.
Check that the protective devices
downline of the 230V transformer
are intact.
Check that the phase sequence is
correct and that the phase sequence
relay is intact.
Correct the weight distribution of the
unit by adjusting the height of the
anti-vibration mounts.
If it is not possible to work on the
control of the pump, partially close
the shut-off device on the delivery
side of the unit until the nominal flow
rate is restored.
Check that the air valves are not
shut off by valves.
Vent the system.
We reserve the right to make changes without any prior notice.
UATYA
4P645202-1