(Only SEZ-A18AR.TH, SEZ-A24AR.TH) ERROR CODE “6800” displays on remote controller.
Outdoor unit doesn’t operate. (LED display: Both LED1 and LED2 lighting)
Check if there is amplitude of 5 to 10V DC between
outdoor terminal block N and 3 (for confirmation of serial
signal) and if there is 230V AC between 2 and N.
· Turn OFF inverter-controlled lighting equipment.
· Turn OFF the power supply and then turn ON again.
· Press the TEST button twice.
w Short circuit of JPG and JPS on the indoor
controller board enables self-check to be
displayed in 3 seconds.
As for indoor unit SEZ type, refer to service manual OC303.
Is mis-wiring indicated when the contactor (52C) on
the indoor controller board turns ON 3 minutes later?
Yes
No
· Reinstall either the unit or the
light each other away.
· Exchange the indoor controller
board.
Start
No
• Turn ON the power supply.
• Press once TEST button twice.
Is there any mis-wiring, poor contact,
or wire disconnection? w2
Make them sure.
Yes
After 3 minutes, mis-wiring is indicated
(0.5-second ON, 0.5-second OFF) on
OPERATION lamp on remote controller. w
Is there 325V DC between CN801 1 and 3 on the
outdoor electronic control P.C. board?
Replace the outdoor
electronic control P.C.
board.
Yes
No
Check of power
supply.
How to check mis-wiring and serial signal error (when outdoor unit does not work)
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