Mitsubishi KXZ Series - Page 235

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233
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'20 • KX-T-373
Error code
Remote control:
7-segment display:
LED Green Red
Indoor
Outdoor
Content
〔
No display
〕
[No display]
Stays OFF Stays Off
Stays OFF Stays Off
1. Applicable model
5. Troubleshooting
All models
(No display on the remote
control after power ON)
Diagnosis Countermeasure
NO
NO
NO
YES
YES
YES
No display on the remote
control after power ON
Is DC10V
or higher between X-Y
detected at remote
control terminal?
Is DC10V
or higher between X-Y
wires detected when
removing remote
control?
Are
connecting wires between
indoor and outdoor units
connected properly?
Remote control anomaly.
Remote control anomaly.
Correct connecting wire.
Indoor unit control PCB
anomaly
2. Error detection method
3
. Condition of error displayed
4. Presumable cause
• Fuse blown
• Noise filter anomaly
• Anomalous connection of
wire between PCBs
• Indoor unit control PCB anomaly
• Remote control anomaly
• Breakage of connecting wires
of remote control
• Outdoor unit control PCB anomaly
Note:
Error code
Remote control:
7-segment display:
LED Green Red
Indoor
Outdoor
Content
E1
Remote control
communication error
Stays Off
Stays Off
1. Applicable model
5. Troubleshooting
All models
Diagnosis Countermeasure
Is it possible to
reset normally by the power
source reset?
Does the drain
pump restart automatically
1 minute later?
Turn SW7-1 to OFF → ON
Disconnect the wire 󱨶 or 󱨷
between indoor and outdoor
units.
YES
YES
NO
Note (1) SW7-1: OFF → ON
Note (3) Does the remote control displays “Internal check ON” [ ] even
after 3 minutes?
Connect the wire 󱨶 or 󱨷
between indoor
and outdoor units.
Reset power source.
(3)
(1)
Note (2) Only unit with drain pump
(2)
NO
Malfunction by noise
Check peripheral
environment.
Defective remote control or
defective indoor PCB

Replace.
Move to
E5(Communication error
during operation)diagnosis.
2. Error detection method
When normal communication
is interrupted for more than 2
minutes between the remote
control and the indoor unit
(Detectable only with the
remote control)
3 . Condition of error displayed
Same as above
4. Presumable cause
• Defective communication
circuit between remote control
and indoor unit
• Noise
Note:
If the indoor unit cannot communicate normally with the remote control for 180 seconds, the indoor unit PCB starts to
reset automatically.