Midea MDVS-335W/DRN1 - Page 214

R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04
212 Troubleshooting
3.13 P6: Inverter module protection; H4: P6 protection appears three times in 60 minutes
When the system displays H4 error code, the system can resume only by restarting the machine. At this time,
malfunction should be disposed promptly to avoid further damage.
L1: low voltage protection
L4: MCE error
L2: high voltage protection
L8: frequency difference
in one second more than
15Hz
L9: frequency difference
between the real and the
setting frequency more
than 15Hz
L0: module protection
L5: Zero speed protection
L7: Phase sequence
error
P6 will disappear in one
minute. Then press the
check button to find the
specific error code
Check module and
compressor
Check power supply of
module
Check power supply of
module
Check module and
electric circuit
Check electric circuit
and compressor
Check module and
wiring connection
Check compressor
Check compressor
H4 will display if P6 occur
3 times in 60 minutes
Check whether inverter
module is broken, and
eliminate the situation that
DC generatrix is connected
inversely