Notices For Unit Debugging - Gree GMV-224WM/G-U Owner's Manual

4.2 Notices for Unit Debugging

(1) Before conducting the debugging, please ensure that the compressor has been preheated
for more than 2 hours, and check whether the preheating is normal by hand. Debugging can
be started up only when the preheating is normal, otherwise the compressor may be
damaged.
(2) When starting up the debugging, the system automatically selects the operating mode
according to the current ambient temperature.
(3) When debugging, the front panel of the outdoor unit must be completely closed, otherwise it
will affect the accuracy of debugging (as shown in the Fig
(4) Display instruction for each stage progress at the time of debugging:
Debugging
—
code
LED1
Progress
Display
Code
db
db
01_set up
master unit
db
db
Instruction for each stage progress at the time of debugging
Progress code
LED2
Display
Code
status status
ON 01 ON
ON 01 ON
ON 01 ON
ON 01 ON
Fig.4.2.1
Fig.4.2.2
Status code
LED3
Display
Code
status
A0 ON Undebugged status.
The system hasn't set master module. It needs
CC ON
to reset it.
The system has set more than 2 master
CF ON
modules. It needs to reset it.
Master module setting is succeeded. It will
OC ON
automatically enter into the next step.
49
GMV DC Inverter VRF
as below).
.4.2.2
Meaning