Mitsubishi Heavy Industries SRK100VNXWZRF Service Manual page 94

Error code
E1
Remote control:
1. Applicable model
All models
2. Error detection method
When normal communication
between the remote control and
the indoor unit is interrupted
for more than 2 minutes
(Detectable only with the
remote control)
3. Condition of error displayed
Same as above
4. Presumable cause
• Defective communication
circuit between remote
control-indoor unit
• Noise
• Defective remote control
• Faulty indoor unit control PCB
• Defective interface kit
Note:
If the indoor unit cannot communicate normally with the remote control for 180 seconds, the indoor unit PCB starts to reset
automatically.
RUN light TIMER light
Indoor
display
– –
Green LED Red LED
Outdoor unit
control PCB
Keeps flashing Stays OFF
5. Troubleshooting
Diagnosis
Is it possible to
reset normally by the
power reset?
NO
Is DC10V or
higher detected at remote control connection
terminals?
NO
Is DC10V or higher
detected on remote control wires if
the remote control is
removed?
NO
Is DC10V or
higher detected at interface kit connection
terminals?
NO
Is DC10V or higher
detected on connecting wires if
the interface kit is
removed?
NO
Are wires
connected properly between the
indoor/outdoor units?
NO
Note Does the remote control still display "
after 3 minutes?
93
-
Content
Remote control
communication circuit error
YES
YES
YES
YES
YES
YES
" even
WAIT
-
'22 • PAC-SM-422
Countermeasure
Malfunction by noise
Check peripheral
environment.
Defective remote control
Defective remote control
Defective interface kit
Defective interface kit
Defective connecting wire
Defective remote control
wire (Short-circuit, etc.)
Defective indoor unit
control PCB➞Replace.