Daikin Sky Air R-407C Service Manual page 270

Error Codes: Outdoor Units
1
Troubleshooting
3 3
4
5
3–40
To troubleshoot, proceed as follows:
Check the connections of the
high pressure systems.
Is HPS
correctly connected to
the outdoor unit
PCB?
Yes
Ÿ
Turn the power OFF and back
ON after 2 or 3 minutes.
Ÿ
Check the continuity of the HPS
for control and safety.
Does the HPS have
continuity?
Yes
Is the unit in
cooling mode?
Yes
Check high
pressure during
operation.
Tc(HP) > Ta outdoor + 30°C
set value 1 > HP > set value 2
Yes
Faulty refrigerant
piping circuit.
Some models are not equipped with a HPS.
No Connect correctly.
Replace HPS
No
without continuity.
Check high
No pressure during
operation.
Tc(HP) > Ta indoor + 35°C
set value 1 > HP > set value 2
Yes
Faulty refrigerant
piping circuit.
Replace outdoor
No
unit PCB.
ESIE02–01
Replace outdoor
No
unit PCB.
Tc(HP) = heat exchanger temp.
Ta indoor = indoor air temp.
Ta outdoor = outdoor air temp.
HP = high pressure
set value 1 = max. pressure
set value 2 = min. pressure
Refer to high pressure settings
Part 3 – Troubleshooting