Service manual

ESIE03–01 Error Codes: Outdoor Units
Part 3 – Troubleshooting 3–45
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Troubleshooting To troubleshoot, proceed as follows:
Caution Be sure to turn off power switch before connecting or disconnecting the connector, or parts damage
may occur.
Check the connections of the
high pressure systems.
Is HPS
correctly connected to
the outdoor unit
PCB?
Connect correctly.
y Turn the power OFF and back
ON after 2 or 3 minutes.
y Check the continuity of the HPS
for control and safety.
Does the HPS have
continuity?
Replace HPS
without continuity.
Check high
pressure during
operation.
Tc(HP) > Ta indoor + 35 °C
set value 1 > HP > set value 2
Replace outdoor
unit PCB.
No
Yes
No
No
Yes
Is the unit in
cooling mode?
No
Check high
pressure during
operation.
Tc(HP) > Ta outdoor + 30 °C
set value 1 > HP > set value 2
Replace outdoor
unit PCB.
Faulty refrigerant
piping circuit.
No
Yes
Yes
Yes
Faulty refrigerant
piping circuit.
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
Some models are not equipped
with a HPS.