Daikin VRV S RXQ4/5ARV1 - Transmission Error (between Centralized Controllers)

Troubleshooting by Error Code SiAF332111E
328 Part 6 Service Diagnosis
Reference
5.70 Transmission Error (between Centralized Controllers)
Applicable
Models
Centralized controller
intelligent Touch Controller
Schedule timer
Error Code M8
Method of Error
Detection
DIII-NET communication data is used to detect the error. (Automatic reset)
Error Decision
Conditions
When the sub centralized controller is activated, there is no main centralized controller.
The previously connected centralized controller is not responding.
Supposed
Causes
 Transmission defect between centralized controllers
 Defective centralized controller PCB
Troubleshooting
CHECK 15 Refer to page 355.
NO
YES
NO
Reset the power supply of
all the centralized
controllers.
Connect the power supply
of the centralized
controllers.
Replace the intelligent
touch controller.
YES
YES
SEYON
Is there any
display on the LCD
screen?
NO
Set the reset switch
(inside the unit) and
SS1 to the normal
position.
Replace the
centralized controller.
Correct the wiring.
∗1. intelligent Touch Controller screen operation
If there is no display on the touch screen, adjust the
contrast knob.
YES
NO
NO
YES
CHECK 15
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Is the
centralized
controller No. changed?
(Number of centralized
controllers removed
or added)
Does
the power supply of
all the centralized controllers
connect?
Are the
reset switch (inside
the unit) and SS1 set to the
normal position?
The unit with the error code
M8 has broken
wire.
Still
no display after
operating the intelligent
touch controller.
(∗1)
Either of the centralized controllers is
failing. Run/stop the unit by all the
centralized controllers, and replace
the centralized controllers that fail to
control the indoor unit.