Function Of Leds - Hitachi Utopia RPI-2.5HRG Service Manual

TROUBLESHOOTING

1.2.6 Function of LEDs

(1) Printed Circuit Board in Indoor Unit
( * Following figure shows a separated-board type PCB.)
RCI Series
PCB1
■ LED Functions on Indoor Unit Printed Circuit Board for Control
Part Name
1 LED1
(Red)
2 LED3
(Yellow)
3 LED4
(Red)
■ LED Functions on Indoor Unit Printed Circuit Boards for Power Supply (PCB2 for RCI Series only)
Part Name
LED1
(Red)
1-62
PCB2
LED4
LED1
LED3
Contents of Functions
This LED1 indicates the transmission state between
the indoor unit and remote control switch.
Normal Condition:
Abnormal Condition:
This LED3 indicates the transmission state between
the indoor unit and outdoor unit.
Normal Condition:
Abnormal Condition:
This LED4 indicates the power supply (5V) for
micro-computer.
Normal Condition:
Abnormal Condition:
Contents of Functions
This indicates the voltage between terminals of capacity
C1 on the PCB for DC fan motor.
Activated: The voltage between both terminals
of capacity, C is 50+20V or greater.
Deactivated: The voltage between both terminals
of capacity, C is 50+20V or smaller.
RPI, RCD and RPC Series
LED1
Flickering
Activated or Deactivated
Flickering One Time/Some Seconds
Activated or Deactivated more
than 30 seconds or Flickering
(30 times/1 second)
Activated
Deactivated
LED1
LED3
LED4
Remarks
-
-
-
Remarks
-