Gree GMV5E Series Service Manual page 198

GREE
Check the error code on IDU wired controller. If IDU wired controller displays H1, you should also
check the error code on nixie tube of ODU main control board. Judge the detailed error of fan drive board
according to the error code on main control board and arrange troubleshooting accordingly.
Possible reason：
■Fan drive IPM module protection (Nixie tube on ODU main control board displays H6)
■Inverter fan overcurrent protection (Nixie tube on ODU main control board displays H5)
■Fan drive communication error (Nixie tube on ODU main control board displays C3)
Troubleshooting:
Step one: Check IDU wired controller error code
Step two: Also check the error code on nixie tube of ODU main control board
Step three: Arrange troubleshooting according to the error code displayed on ODU nixie tube
(Detailed troubleshooting steps refer to the corresponding error)
2.2.4.77 "H2" Fan drive board power supply voltage protection
Error display: IDU wired controller will display
Error judgment condition and method:
Check the error code on IDU wired controller. If IDU wired controller displays H2, you should also
check the error code on nixie tube of ODU main control board. Judge the detailed error of fan drive board
according to the error code on main control board and arrange troubleshooting accordingly.
Possible reason：
■Fan drive DC bus high voltage protection (Nixie tube on ODU main control board displays HH)
■Fan drive DC bus low voltage protection (Nixie tube on ODU main control board displays HL)
Troubleshooting:
Step one: Check IDU wired controller error code
Step two: Also check the error code on nixie tube of ODU main control board
Step three: Arrange troubleshooting according to the error code displayed on ODU nixie tube
(Detailed troubleshooting steps refer to the corresponding error)
2.2.4.78 "H3" Fan drive module reset protection
Error display: IDU wired controller will display
Error judgment condition and method:
Check the error code on nixie tube of ODU main control board. If H3 is displayed, it indicates fan
drive board module reset protection
Possible reason：
■Fan drive board is abnormal.
GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
194