Midea VRF Series User Manual

V6R VRF 50/60Hz
144
Midea
V6R
Series Service Manual
2.30 CB1, CB2, CB3, CB4: Overmatch protection
Digital display output
Description
 CB1: VRF indoor exceeds the match range (the highest priority)
 CB2: AHU kit exceeds the match range (second highest priority)
 CB3: HT exceeds the match range (third highest priority)
 CB4: The total connection ratio exceeds the match range (the fourth highest priority)
 All units stop running.
 Error code is only displayed on the master unit.
Trigger / recover condition
 Trigger condition: the indoor unit connection ration exceeds the match table below.
 Recover condition: the indoor unit connection ration in the range of the match table.
 Reset method: Manually restart.
Table 6-2.1: Match table
IDU1
IDU2
IDU3
Total
connection
ratio A(%)
IDU1
connection
ratio B(%)
IDU2
connection
ratio C(%)
IDU3
connection
ratio D(%)
Note
VRF indoor
/
/
40 ≤ A ≤ X
1
40 ≤ B ≤ X
1
/
/
Connect at least
one VRF Indoor
HT
/
40 ≤ A ≤ 205
40 ≤ B ≤ X
1
C ≤ 105
/
/
AHU kit
40 ≤ A ≤ X
1
40 ≤ B ≤ X
1
/
C ≤ 65
AHU kit
/
/
40 ≤ A ≤ 115
/
/
D ≤ 115
Notes:
1. X is 205 for single outdoor unit system; X is 155 for 2 outdoor units combination system; X is 135 for 3 outdoor units combination units system
Possible causes
 Connection ratio does not meet the requirements.
Procedure
CB1, CB2, CB3, CB4
Change indoor unit connection ratio

Midea VRF Series Specifications

General

Brand	Midea
Model	VRF Series
Category	Air Conditioner
Language	English