Daikin VRV IV-S RXTQ-TAVJU Series Service Manual page 146

Service Check Function
Monitor mode
To enter the monitor mode, press
the MODE (BS1) button when in
"Setting mode 1".
Selection of setting item
Press the SET (BS2) button and set
the LED display to a setting item.
Confirmation of error 1
Press the RETURN (BS3) button
once to display "First digit" of error
code.
Confirmation of error 2
Press the SET (BS2) button once to
display "Second digit" of error code.
Confirmation of error 3
Press the SET (BS2) button once to
display "error location".
Confirmation of error 4
Press the SET (BS2) button once to
display "master or slave 1 or slave 2"
and "error location".
Press the RETURN (BS3) button
and switches to the initial status of
"Monitor mode".
∗ Press the MODE (BS1) button and
returns to "Setting mode 1".
133
Inverter over-ripple protection
Defective temperature sensor of
inverter radiation fin
Refrigerant shortage
Abnormal power supply voltage
No implementation of test-run
Transmission error between indoor
and outdoor unit
Transmission error of other system
Erroneous field setting
Conflict in wiring and piping, no setting
for system
Defective system
Detailed
description
on next
page.
Contents of Error
Imbalance of inverter power supply
voltage
Defective thermistor of inverter fin
Refrigerant shortage alarm
Liquid pipe temperature abnormality
Insufficient Inverter voltage
Open phase in inverter (Phase T)
Error due to SP-PAM overvoltage
Error due to P-N short circuit
I/O transmission error
Indoor unit system error
Indoor unit system abnormal in other
system or other indoor unit system
abnormal in own system
System transmission error
Overconnection error of indoor units
Error of field setting
Refrigerant abnormal
Connection error (BP unit)
Conflict in wiring and piping
Wiring error (Auto-address error)
SiUS331604E
Error Code
P1
P4
U0
U2
U3
U4
U9
UA
UF
UH
Service Diagnosis