Daikin R32 Series - Outdoor Unit LED Fault Diagnosis

7 | Commissioning
Installer reference guide
58
3(A)MXM+3(A)MXF+4MXM+5MXM
R32 Split series
4P600463-1B – 2020.05
2 Measure the temperature at the indoor unit inlet and outlet after running the
unit for about 20minutes. The difference should be more than 8°C (cooling)
or 20°C (heating).
3 First check operation of each unit individually, then check simultaneous
operation of all indoor units. Check both heating and cooling operation.
4 When test run is finished, set the temperature to a normal level. In cooling
mode: 26~28°C, in heating mode: 20~24°C.
INFORMATION
▪ Test run can be disabled if necessary.
▪ After the unit is turned OFF, it cannot be started again for 3 minutes.
▪ When the test run is started in the heat mode right after turning the safety
breaker on, in some cases no air will be output for about 15 minutes in order to
protect the unit.
▪ Operate only air conditioner during test run. Do NOT operate the Hybrid for Multi
or the DHW generator during test run.
▪ During cooling operation, frost may form on the gas stop valve or other parts.
This is normal.
INFORMATION
▪ Even if the unit is turned OFF, it consumes electricity.
▪ When the power turns back on after a power break, the previously selected
mode will be resumed.
7.6 Starting up the outdoor unit
See the indoor unit installation manual for configuration and commissioning of the
system.
7.7 Fault diagnosis using LED on outdoor unit PCB
Symbol LED is...
On
Off
Flashing
Red LED
(a)
Diagnosis
1 2 3 4 5
Normal.
▪ Check the indoor unit.
High-pressure protector worked or freeze-up in operating
unit, or stand-by unit.
Overload relay worked or high discharge pipe
temperature.
(b)
Faulty compressor start.