Table of Contents
Advertisement
ESIE16-02K
|
Part 2. Troubleshooting
2.1.2. Error codes via outdoor unit PCB2 (Service PCB) (3MXM-N(9), 4MXM-N(9),
5MXM-N(9))
2.1.2.1. How to retrieve error codes
Troubleshooting via the service display.
GREEN
MICRO-
MALFUNCTION DETECTION
COMPUTER
NORMAL
LED
LED
LED-A
1
2
c
x
x
c
w
x
c
w
x
c
x
w
c
x
w
c
w
w
c
w
w
c
x
x
c
x
x
c
x
x
c
w
x
c
w
x
c
w
w
c
w
w
c
x
w
w
—
—
c
—
—
Note 1: Turn the power off and on again
1. Service monitor LEDs
31/05/21
|
Version 1.1
RA R32 Split & multi split M-Series
RED
LED
LED
LED
3
4
5
x
x
x
normal -> check indoor unit
w
w
x
high pressure protector activated or freeze-up in operating unit, or stand-by unit
w
x
x
overload relay activated or high discharge pipe temperature
w
x
x
faulty compressor start
x
w
x
input overcurrent
x
x
x
thermistor or ct abnormality
x
w
x
high temperature switchbox
x
w
x
high temperature at inverter circuit heatsink
w
x
x
output overcurrent
w
w
x
refrigerant shortage
x
w
x
low voltage to main circuit or over voltage to main circuit
x
x
x
reversing solenoid valve switching failure. * or high pressure switching failure
w
x
x
faulty outdoor unit pcb
w
w
x
fan motor fault
x
x
x
wiring error check unfinished
—
—
—
(Note 1)
—
—
—
power supply fault
Figure 2-1: Service display location
1
GREEN
FLASHING: NORMAL
RED
OFF: NORMAL
* MAY NOT BE APPLICABLE DEPENDING ON THE MODEL
DIAGNOSIS
2.1. Error codes check
w
c
ON
FLASHING
x
—
OFF
ANY STATUS
Page 19
Advertisement
Table of Contents
Troubleshooting
