Midea MDV-V140W/DRN1 User Manual

MCAC-VTSM-2016-10 R410A All DC Inverter Mini VRF
Troubleshooting 93
4.15.4 L1 / L2 troubleshooting
The normal DC voltage between terminal P and N on inverter module is 540V. If the voltage is lower than
300V, the unit is in L1 error. If the voltage is higher than 800V, the unit is in L2 error.
Condition 1: L1 or L2 error appears immediately when the outdoor unit is power on.
L1 /L2
P N +15V wire is not connected
properly
1
Yes
Ensure P N +15V wire is connected
properly
No
Voltage between N and +15 is
abnormal
2
Yes
Check +15V circuit
3
No
DC voltage between terminal P and N
is abnormal
Yes
Check power supply, three phase
bridge rectifier
4
No
Replace the main PCB
Notes:
1. P N +15V terminal on main PCB:
2. Voltage between N and +15
V
normal
= 540V DC
P N +15 terminal
V
normal
= 15V

Midea MDV-V140W/DRN1 Specifications

General

Brand	Midea
Model	MDV-V140W/DRN1
Category	Inverter
Language	English