Transmission Error Between Control And Inverter Pcb - Daikin RZQ Series FCQ20EVA Service Manual

SiME281501E

4.32 Transmission Error between Control and Inverter PCB

LC
Error Code
Applicable RZQ20-45LVA
Models
Method of Error
Check whether transmission between control and inverter PCB is carried out normally.
Detection
Error Decision
When the transmission is not carried out in a specified period of time or longer
Conditions
 Incorrect transmission wiring between control and inverter PCB/insufficient contact in wiring
Supposed
 Defective control and inverter PCB
Causes
 External factor (Noise, etc.)
 Defective outdoor unit fan motor
 Defective of fan motor connector contact
Troubleshooting
Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged.
fan motor connector
connected to the outdoor
Disconnect the fan motor connector,
and turn ON again.
E7
" " displayed? (Is "
micro-computer normal
monitor (green) on inverter
the micro-computer
normal LED on control PCB
Service Diagnosis
Is the
NO
unit PCB?
YES
Is the error code
YES
LC
" not
displayed?)
NO
Is the
NO
PCB blinking?
YES
Is
NO
blinking?
YES
Troubleshooting by Remote Controller
Connect the connector, and turn
ON again.
Replace the fan motor.
Inverter transmission
error due to the error of
fan motor.
Replace the outdoor unit
inverter PCB.
Replace the outdoor unit control
PCB.
Check for defective connector
connection in the transmission
wiring and for clamps with high
tension line.
134