Troubleshooting By Led On Inverter Outdoor Unit Pcb - Daikin SkyAir Super Inverter 70 D Series Service Manual

Procedure of Self-Diagnosis by LED
5.2

Troubleshooting by LED on Inverter Outdoor Unit PCB

The following diagnosis can be conducted by turning on the power switch and checking the LED
indication on the printed circuit board of the outdoor unit.
4
Notes: 1. Turn off the power switch, and turn it on again after 5 seconds or more. Check the error
2. Turn off the power switch. After 5 seconds or more, disconnect the connection wire (2). Then
3. The error detection monitor continues to indication the previously generated error until the
4. Also check for open phase.
128
: LED on 3 : LED off
Microcomputer
in normal
operation
HAP H1P
(Green) (Red)
5 3
—
4
—
3
5 4
4
3
3
4
3
3
4
3
condition, and diagnose the problem.
turn on the power switch. If the HAP on the outdoor unit PCB flashes after about 10 seconds,
the indoor unit PCB is faulty.
power switch is turned off.
Be sure to turn off the power switch after inspection.
5 : LED blinks — : Not used for diagnosis
Error detection
H2P H3P H4P
(Red) (Red) (Red)
3 3 3
— — —
— — —
3 3 3
4 3 3
3 4 3
3 3 4
3 3 4
3
4 4 4
4 4 4
4 3 3
Description
Normal
Faulty outdoor unit PCB (Note 1)
Power supply abnormality, or faulty
outdoor unit PCB (Note 2)
Activation of protection device (Note 4)
Faulty thermistor
Compressor motor ground fault, short-
circuit, power transistor short-circuit
Faulty inverter cooling
Momentary outage of supply voltage
Fan motor system error
Compressor overload, open circuit in
compressor motor
Compressor seizing
Open phase power supply or main circuit
capacitor malfunction
SiE25-110
Troubleshooting