Daikin R71FUV1 Service Manual page 84

Troubleshooting by Remote Controller
Error code
U0 - 03 Refrigerant shortage -
Outdoor unit (Factor 1)
U0 - 04 Refrigerant shortage -
Outdoor unit (Factor 2)
U2 - 01 Power supply voltage error
U2 - 02 Open phase of power supply
U2 - 03 Main circuit capacitor charge
error
U2 - 04 SP/MP - PAM overvoltage
error
UA - 01 Incorrect number of indoor
units connected
UA - 02 Multiple master units
detected
UA - 03 Excess indoor units
connected
Description of error
Troubleshooting
Description of diagnosis
This error results from a
refrigerant shortage cause by
gas leakage. Charge
refrigerant up to the normal
refrigerant amount.
This error results from
clogging caused somewhere
in the refrigerant piping
system. Check for a failure to
open the stop valve and
clogging in the refrigerant
system.
This error is supposed to
have resulted from under- or
overvoltage of the power
supply, or defective voltage
sensor in the PCB.
Check for any open phase of
the power supply.
There is abnormal circuit
current flowing in the PCB. If
wire connections related to
the PCB are normal, replace
the outdoor unit PCB.
There is overvoltage between
SP/MP and PAM (Single
phase). If wire connections
related to the PCB are
normal, replace the outdoor
unit PCB.
This error will be displayed if
the locally-set number of
indoor units is different from
the detected number of
indoor unit.
There are a number of indoor
units with a remote controller
connected.
Connect the remote controller
to only one indoor unit.
This error will be displayed if
5 or more indoor units are
connected.
Si20-701_B
77