Maintenance And Care - Gree GMV-72WM/B-U Owner's Manual

Error Code
UE Charging of refrigerant is invalid
Identification malfunction of IDU of
UF
mode exchanger
Communication malfunction between
C0
IDU, ODU and IDU's wired controller
Communication malfunction between
C1
main control and DC-DC controller
Communication malfunction between
C2 main control and inverter compressor
driver
Communication malfunction between
C3
main control and inverter fan driver
C4 Malfunction of lack of IDU
Alarm because project code of IDU is
C5
inconsistent
Status:
Error Code
A0 Unit waiting for debugging
Refrigerant recovery operation of
A2
after-sales
A3 Defrosting
A4 Oil-return
A6 Heat pump function setting
A7 Quiet mode setting
A8 Vacuum pump mode
AH Heating
AC Cooling
AL Charge refrigerant automatically
AE Charge refrigerant manually
AF Fan
AJ Cleaning reminding of filter
Debugging confirmation when starting
AP
up the unit
AU Long-distance emergency stop
Ab Emergency stop of operation
Ad Limit operation
An Child lock status

8 Maintenance and Care

Regular check, Maintenance and care should be performed every six months by professional
personnel, which will prolong the unit life span. Disconnect the power supply before cleaning and
maintenance.
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Error Code
Address DIP switch code of system is
CJ
shocking
CP Malfunction of multiple wired controller
Communication malfunction between
CU
IDU and the receiving lamp
Cb Overflow distribution of IP address
Communication malfunction between
Cd
mode exchanger and ODU
Malfunction of network for IDU and
Cn
ODU of mode exchanger
Communication malfunction of mode
Cy
exchanger
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Error Code
Ay Shielding status
n0 SE operation setting of system
n3 Compulsory defrosting
Limit setting for max. capacity/output
n4
capacity
Compulsory excursion of engineering
n5
code of IDU
n6 Inquiry of malfunction
n7 Inquiry of parameters
n8 Inquiry of project code of IDU
n9 Check quantity of IDU on line
nA Heat pump unit
nH Heating only unit
nC Cooling only unit
nE Negative code
nF Fan model
High temperature prevention when
nJ
heating
Eliminate the long-distance shielding
nU
command of IDU
nb Bar code inquiry
Length modification of connection pipe
nn
of ODU
GMV DC Inverter VRF
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