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Check SiUS121827E
240 Part 6 Service Diagnosis
8.9 Rotation Pulse Check on the Outdoor Unit PCB
Check No.16 Manually rotate the outdoor fan motor and check if 4 pulses of sinusoidal voltage are detected
between pins 1-2 and then pins 2-3.
R6000524
8.10 Installation Condition Check
Check No.17
3
2
1
U (red)
S70
V (white)
W (black)
Installation condition check
OK
Check the allowable
dimensions of the air
suction and
discharge area.
Is the airflow blocked by
obstacles or winds
blowing in the opposite
direction?
(R19394)
NG
YES
YES
NO
Is the discharged air
short-circuited?
NO
NO
YES
Is the outdoor heat
exchanger very dirty?
Change the installation
location or direction.
Change the installation
location or direction.
Clean the outdoor heat
exchanger.
Change the installation
location or direction.
Check the outdoor temperature.
(The outdoor temperature
should be within the operation
range.)
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