Replace fan motor.
Rotate shaft of the fan motor by hands
during power-OFF, Can it rotate smoothly?
Is coil resistance of fan motor correct?
Between red and white lead wire :12 to 20Ω.
Between white and black lead wire :12 to 20Ω.
Between black and red lead wire :12 to 20Ω.
YES
NO
YES
NO
NO
NO
YES
NO
Is AC mains voltage correct?
(198 to 264V)
Correct connector.
Sensor error → Replace.
Check outdoor P.C.B WP-041
Defect → Replace.
Check wiring construction.
Ask repair of power supply.
Check outdoor P.C.B
MCC-1571 Defect → Replace.
Is connection of CN600
on P.C.B WP-041 correct?
Is resistance value of TD sensor correct?
Correct connector.
Sensor error → Replace.
Check outdoor P.C.B WP-041
Defect → Replace.
Is connection of CN602
on P.C.B WP-041 correct?
Is resistance value of TO sensor correct?
Check
code
Outdoor
LED display
Check and troubleshooting
(Item without special mention indicates part of outdoor unit.)
[Discharge temp. sensor (TD) error]
[Fan system error]
[Outside temp. sensor (TO) error]
[1A]
[1b]
[19]
zz
{*{*
z
z
{*
z*z
*z**z
{
{:ON
(
{*:3 sec ON / 0.5 sec OFF)
z:OFF
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