R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09
138 Troubleshooting
4.6 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
The addresses should be set less
than 3 and differently
Outdoor main PCB is damaged
Replace the outdoor main PCB
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)
Replace or reconnect the
communication wires
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