Troubleshooting with LED
SiSG121917E
105
Part 6 Service Diagnosis
Caution
FDMR Series with Wireless Remote Controller
When operation stops suddenly and the operation lamp blinks, it could be operation mode
conflict.
1. Check if the operation modes all the same for the indoor units connected to multi system
outdoor unit.
2. If not, set all the indoor units to the same operation mode and confirm that the operation
lamp is not blinking.
3. Moreover, when the operation mode is automatic, set all the indoor unit operation mode as
cooling or heating and check again if the operation lamp is normal.
If the lamp stops blinking after the above steps, there is no malfunction.
Operation stops and operation lamp blinks only for the indoor unit that has a different operation
mode set later. The first set operation mode has priority.
Service Monitor
FDKS, FDMR Series
The indoor unit has one green LED (LED A/HAP) on the control PCB. When the microcomputer
works in order, the LED blinks. Refer to pages 32, 34 for the location of LED.
Wired Remote Controller
Operation
lamp
(green)
(R24930)
Operation lamp(green)
(R25259)
