Gree GMV-615WM/G-X - Page 107

Gree GMV6 DC Inverter VRF Units Service Manual
105
2.52 "dH" Abnormal Circuit Board of Wired Controller
Fault display: wired controller of indoor unit and receiver of indoor unit display
Fault diagnosis:
The wired controller's IIC communication is abnormal.
Possible causes:
■ The communication between the wired controller's touch keypad and display panel IIC is abnormal;
■ The wired controller's memory chip IIC cannot be read or written properly (if there are any memory
chips).
Troubleshooting:
No
"dH" Abnormal Circuit
Board o f Wired Controller
Install the keypad and
display panel respective ly
The IIC may b e in po or
contact with related
components due to
moisture, or corrosion, etc.
Yes
Replace the wired
controller
Whether th e touch keyp ad
of the wired contr oller is well co nnected
to the display panel?
Yes
2.53 "dC" Abnormal Settings of DIP Switch for Capacity
Fault display: wired controller of indoor unit and receiver of indoor unit display
Fault diagnosis:
If DIP switch for capacity is set to the wrong position, the fault is generated.
Possible causes:
■ DIP switch for capacity is set to a wrong position;
■ Abnormal detection circuit.
Troubleshooting: