E8: Faulty Outdoor Unit Address; E9: Driver Model Is Mismatched - Midea V5 X VRF Series Technical & Service Manual

R410A All DC Inverter V5 X Series 50Hz

4.7 E8: Faulty outdoor unit address

The error will only display on faulty slave unit, all the ODUs will be on standby.
E8: Faulty outdoor unit address
The ODU's address is more than 3 or
be set repeatedly
No
The communication wires H1, H2 and
E are short circuited or disconnected.
(measure the resistance between H1,
H2andE, if it is zero or very low, this is
indication of short circuiting; use a
multi-meter to test the communication
wires, if it doesn't have belling sound,
this is indication of disconnecting)
No
Outdoor main PCB is damaged
4.8 xE9: Driver model is mismatched (when X is 1, it refers to A system; 2 refers to B system)

E9: Driver model is mismatched

Power on the outdoor unit immediately
after it is powered off
No
Outdoor main PCB is damaged
142
The addresses should be set less
Yes
than 3 and differently
Replace or reconnect the
Yes
communication wires
Replace the outdoor main PCB
If the outdoor unit is powered off, the
Yes
unit should be powered on after the
digital tube is powered off
Replace the outdoor main PCB
MCAC-VTSM-2015-10
Troubleshooting