![background image](http://html.mh-extra.com/html/daikin/2mx18axvju/2mx18axvju_service-manual_501078057.webp)
Troubleshooting with LED
DAMA-SM-21-003
52
Service Diagnosis
2. Troubleshooting with LED
2.1 Indoor
Unit
Operation Lamp
The operation lamp blinks when any of the following errors is detected.
1. A protection device of the indoor or outdoor unit is activated, or the thermistor malfunctions.
2. 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 a green LED (LED A) on the PCB.
When the microcomputer works in order, the LED A blinks.
Refer to pages 100, 101 for the location of LED A
ON/OFF
switch
LED INDICATION LIGHTS
FU3
FU1
FU2
V4
FU1
FU2
E, E2
S
HL1,HN1,
S
V3
V5
X12A
LEDA
X11A
S90
S70
TH1
S90
S92
S91
S70
S80
S70
S21
S20
S40
TH1
DAMA-SM-21-003 -Inverter Multi Split-CTX Series.book Page 52 Wednesday, September 1, 2021 5:44 PM
Summary of Contents for 2MX18AXVJU
Page 2: ......