Troubleshooting With Led; Indoor Unit; Outdoor Unit - Daikin FTKN09NMVJU Service Manual

SiUS041501E

2. Troubleshooting with LED

2.1

Indoor Unit

Operation Lamp The operation lamp blinks when any of the following errors is detected.
1. When a protection device of the indoor or outdoor unit is activated, or when the thermistor
2. When a signal transmission error occurs between the indoor and outdoor units.
In either case, conduct the diagnostic procedure described in the following pages.
2.2

Outdoor Unit

The outdoor unit has one green LED (LED A) on the PCB. When the microcomputer works in order,
the LED A blinks. However, the LED A turns OFF while the standby electricity saving function is
activated and the power supply is OFF. (Refer to page 20, 21 for the location of LED A.)
Service Diagnosis
malfunctions.
Operation lamp
(green)
ON/OFF
(R21056)

Troubleshooting with LED

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