Daikin RMXS-L Series Service Manual page 187

SiUS181631EA
Monitor mode
Press MODE (BS1) button and enter
the monitor mode.
Selection of check item
Press SET (BS2) button and select
a check item according to the LED
pattern of No.14~16 and No.20~22.
Refer to page 130 for check items.
Confirmation of malfunction 1
Press RETURN (BS3) button once
to display the first digit of error code.
Confirmation of malfunction 2
Press SET (BS2) button once to
display the second digit of error
code.
Confirmation of malfunction 3
Press SET (BS2) button once to
display the malfunction location.
Confirmation of malfunction 4
Press SET (BS2) button once to
display the malfunction unit and the
malfunction location.
Press RETURN (BS3) button and
return to the initial status of monitor
mode.
∗ If you become unsure of how to
proceed, press MODE (BS1) button
and return to the setting mode 1.
Troubleshooting
High voltage of capacitor in main
inverter circuit
Radiation fin thermistor abnormality
Low pressure drop due to refrigerant
shortage or electronic expansion valve
abnormality
Power supply insufficient or
instantaneous failure
Check operation is not conducted.
Transmission error between indoor
unit and BP unit
Transmission error between indoor
unit and outdoor unit in the same
system
Field setting switch abnormality or
Excessive number of indoor units
System abnormality, refrigerant
system address undefined
Detail System is not set yet
description
on next
page.
Troubleshooting with LED
Contents of malfunction
Imbalance of inverter power supply voltage
Faulty thermistor of inverter fin
Refrigerant shortage alarm
Insufficient Inverter voltage
Faulty charge of capacitor in main inverter circuit
Malfunction due to SP-PAM overvoltage
Malfunction due to P-N short circuit
I/O transmission error
I/O transmission error
Indoor unit system abnormal in other system
or other indoor unit system abnormal in own
system
System transmission malfunction
Overconnection malfunction of indoor units
Malfunction of field setting
Refrigerant abnormal
Connection error (BP unit)
Wiring error (Auto-address error)
Conflict in wiring and piping
Error
code
P1
P4
U0
U2
U3
U4
U9
UA
UH
UF
177