Midea V6R VRF Series User Manual

V6R VRF 50Hz
90
Midea
V6R
Series Service Manual
Procedure
E2
Communication wires P Q have short
circuited or disconnected
1
Yes
Reconnect the communication wires
No
Communication wires P Q are not
connected in a daisy chain
Yes
Connect the communication wires in a
daisy chain
No
MS box power supply is abnormal
Yes
Ensure normal power supply
No
Wires between outdoor main PCB and
electric control box communication
terminals block are loose
Yes
Ensure the wires are connected properly
No
The sequence of the PQE signal lines is
incorrect.
Yes
Reverse the sequence of signal lines.
No
Interference from high voltage (220V or
higher) wires
Yes
Ensure the communication wires and
high voltage wires are separated
No
Communication wires are close to a
source of electromagnetic radiation such
as transformer or strong fluorescent lamp
Yes
Remove the source of interference, or
add additional shielding to the
communication wires
No
The length of communication wire is over
1200m
Yes
Reduce the wire length to less than
1200m
No
Replace the outdoor main PCB resolves
the error
No
Replace the electric control box
communication terminals block
Notes:
1. Measure the resistance among P, Q and E. The normal resistance between P and Q is 120Ω, between P and E is infinite, between Q and E is infinite.

Midea V6R VRF Series Specifications

General

Brand	Midea
Model	V6R VRF Series
Category	Air Conditioner
Language	English