![background image](http://html1.mh-extra.com/html/daikin/super-multi-plus-e-series-ftxg25ev1bw/super-multi-plus-e-series-ftxg25ev1bw_service-manual_4705813340.webp)
Troubleshooting with LED
SiBE18-821_C
328
Troubleshooting
<Selection of setting item>
<Monitor mode>
<Confirmation of malfunction 1>
To enter the monitor mode, push the
MODE (BS1) button when in
“Setting mode 1”.
Push the SET (BS2) button and set
the LED display to a setting item for
error code.
Refer to page 143 for setting item.
Push the RETURN (BS3) button
once to display "First digit" of error
code.
<Confirmation of malfunction 2>
Push the SET (BS2) button once to
display "Second digit" of error code.
Push the RETURN (BS3) button and
switches to the initial status of
“Monitor mode”.
∗
Push the MODE (BS1) button and
returns to “Setting mode 1”.
<Confirmation of malfunction 3>
Push the SET (BS2) button once to
display "malfunction location".
Detail
description
on next
page.
<Confirmation of malfunction 4>
Push the SET (BS2) button once to
display "master or slave 1 or slave 2"
and "malfunction location".
Contents of malfunction
Error code
High voltage of capacitor in main
inverter circuit
Imbalance of inverter power supply
voltage
P1
Radiation fin thermistor abnormality
Faulty thermistor of inverter fin
P4
Low pressure drop due to refrigerant
shortage or electronic expansion valve
abnormality
Refrigerant shortage alarm
U0
Power supply insufficient or
instantaneous failure
Insufficient Inverter voltage
U2
Faulty charge of capacitor in main inverter circuit
Malfunction due to SP-PAM overvoltage
Malfunction due to P-N short circuit
Check operation is not conducted.
U3
Transmission error between indoor
unit and BP unit
I/O transmission error
U4
I/O transmission error
Transmission error between indoor
unit and outdoor unit in the same
system
Indoor unit system abnormal in other
system or other indoor unit system
abnormal in own system
U9
Field setting switch abnormality or
Excessive number of indoor unit
System transmission malfunction
UA
Overconnection malfunction of indoor units
Malfunction of field setting
Refrigerant abnormal
Connection error (BP unit)
System abnormality refrigerant system
address undefined
Wiring error (Auto-address error)
UH
System is not set yet
Conflict in wiring and piping
UF