MCAC-VTSM-2014-09
R410A All DC Inverter Mini VRF
Troubleshooting 75
7.2 E2: Communication malfunction between indoor chip and outdoor chip.(for all models)
Note:
1. Press indoor unit’s receiver button for 5 seconds, the indoor unit’s communication address code is
displayed; press it for 10 seconds, power code is displayed. Check each unit's address code.
Codes are as follows:
Director light
Running
Timer
Fan/defend cold fan
Warning
Code
8
4
2
1
Address
0
1
2
3
4
5
6
7
8
9
Capacity (×100W)
22
28
36
45
56
71
80
90
112
140
HP
0.8
1.0
1.2
1.6
2.0
2.5
3.0
3.2
4.0
5.0
For example:
LED displays E2
Communication malfunctions between indoor unit chip and outdoor unit chip.
Check the communication wire sequence is
correct or not.
Connect the wire again.
NO
Check whether there is disconnection.
YES
Replace
NO
Check whether the three-cored shielded
wire is used as the communication wire and
earthed properly.
YES
Replace shielded wire or earth the wire
properly.
NO
Indoor unit PCB or outdoor unit PCB malfunction.
Please replace.
Check whether the indoor unit is power on.
Plug the indoor unit in.
NO
YES
