Troubleshooting; Indoor Unit: Error Of External Protection Device; Indoor Unit: Pc Board Defect - Daikin VRV R-407C PLUS Series Service Manual

Troubleshooting

3. Troubleshooting

3.1

Indoor Unit: Error of External Protection Device

A0
Remote Controller
Display
Supposed Causes
Troubleshooting
3.2

Indoor Unit: PC Board Defect

A1
Remote Controller
Display
Supposed Causes
Troubleshooting
128
Actuation of external protection device
Improper field set
Defect of indoor unit PC board
External
protection device is
connected to terminals T1 and
T2 of the indoor unit
terminal block.
NO
ON/OFF
input from
outside (mode No. 12,
first code No. 1) has been
set to external protection
device input (second
code No. 03)
by remote
controller.
NO
Defect of indoor unit PC board
Turn power supply OFF, then
power ON again.
Does the system return to
normal?
NO
YES
YES
YES
Actuation of external protection device.
Change the second code No. to "01" or
"02" .
Indoor unit PC board replacement.
External factor other than
malfunction (for example, noise
etc.).
Replace the indoor unit PC
board.
(V0816)
Troubleshooting R-407C PLUS Series
SiE 00-07
(VF029)