Daikin Aurora Series Service Manual page 178

Symptom-based Troubleshooting
Error code
PJ - 04 Incorrect type of inverter PCB (Master)
PJ - 05 Incorrect type of inverter PCB (Slave 1)
PJ - 06 Incorrect type of inverter PCB (Slave 2)
PJ - 09 Incorrect type of fan PCB (Master): M1F
PJ - 10 Incorrect type of fan PCB (Master): M2F
PJ - 15 Incorrect type of fan PCB (Slave 1): M1F
PJ - 16 Incorrect type of fan PCB (Slave 2): M1F
PJ - 17 Incorrect type of fan PCB (Slave 1): M2F
PJ - 18 Incorrect type of fan PCB (Slave 2): M2F
U0 - 05 Refrigerant shortage warning (cooling)
U0 - 06 Refrigerant shortage warning (heating)
Reverse phase/open phase of power supply
U1 - 01
(Master)
Reverse phase/open phase of power supply
U1 - 04
(when power ON) (Master)
Reverse phase/open phase of power supply
U1 - 05
(Slave 1)
Reverse phase/open phase of power supply
U1 - 06
(when power ON) (Slave 1)
Reverse phase/open phase of power supply
U1 - 07
(Slave 2)
Reverse phase/open phase of power supply
U1 - 08
(when power ON) (Slave 2)
Shortage of inverter 1 power supply voltage
U2 - 01
(Master)
U2 - 02 Open phase of inverter 1 power supply (Master)
Defective capacitor in inverter 1 main circuit
U2 - 03
(Master)
Shortage of inverter 1 power supply voltage
U2 - 08
(Slave 1)
U2 - 09 Open phase of inverter 1 power supply (Slave 1)
Defective capacitor in inverter 1 main circuit
U2 - 10
(Slave 1)
Shortage of inverter 1 power supply voltage
U2 - 11
(Slave 2)
U2 - 12 Open phase of inverter 1 power supply (Slave 2)
Defective capacitor in inverter 1 main circuit
U2 - 13
(Slave 2)
U2 - 36 Fan motor 1 undervoltage (Master)
U2 - 37 Fan motor 1 undervoltage (Slave 1)
U2 - 38 Fan motor 1 undervoltage (Slave 2)
U3 - 02 Initial installation warning
U3 - 03 Test operation not conducted
U3 - 04 Abnormal end of test operation
Premature end of test operation during initial
U3 - 05
transmission error
Premature end of test operation during normal
U3 - 06
transmission error
Premature end of test operation due to
U3 - 07
transmission error of either unit
Premature end of test operation due to
U3 - 08
transmission error of all units
165
Description of error
Troubleshooting
Description of diagnosis
Refer to the PJ flowchart of each manual and make a diagnosis
of the relevant unit based on the Error code shown to the left.
Refer to the U0 flowchart of each manual and make a diagnosis
of the relevant unit based on the Error code shown to the left.
Refer to the U1 flowchart of each manual and make a diagnosis
of the relevant unit based on the Error code shown to the left.
Make a diagnosis of the relevant unit based on the following.
Shortage of power supply voltage
If the other units detect shortage of power supply voltage, power
supply voltage during operation may be unstable. Check the
power supply condition.
If a particular unit detects the error, operation of 52C may be
defective. Follow the U2 flowchart.
Open phase of power supply
The wiring between power supply and inverter PCB may be
disconnected. Check that power supply is connected to terminal
block, terminal block is connected to PCB without broken wire or
disconnection, and reactor wiring is secured. If no abnormality is
found, follow the U2 flowchart.
Defective capacitor in main circuit
P-N on the inverter PCB (electrolytic capacitor, power module)
may be damaged and short circuited. Operation of current limiting
relay may be defective or the wiring between the reactor and PCB
may be disconnected. Measure the resistance between P-N on
the inverter PCB and check for short circuit. If no abnormality is
found, follow the U2 flowchart.
Refer to the U3 flowchart of each manual and make a diagnosis
of the relevant unit based on the Error code shown to the left.
SiUS341802E
Service Diagnosis