Gree GMV-121WL/C-T User Manual

GREE DC Inverter Multi VRF System II Service Manual
72
Stage process instruction for debugging
——
Debugging code
Process code
Status code
Code instruction and operation method
Process
LED1
LED2
LED3
Code
Display
status
Code
Display
status
Code
Display
status
confirm that the preheat time is reached to 8h and
then enter into the next determination. (Note: If
compressor isn’t started up when the preheat time
is not reached to 8h, the compressor may be
damaged. Please be careful.)
db
ON
08
ON
OC
ON
Preheat time for compressor is reached to 8h. 2s
later, it will enter into the next step.
09_ Refrigerant confirmation
before startup
db
ON
09
ON
U4
ON
Refrigerant in system is not sufficient. The
indicator will display by the left method. Please
disconnect the power for indoor unit and outdoor
unit, and check whether the pipeline is leaking.
After leakage problem is solved, recharg
e the
refrigerant according to requirement. After that,
energize the unit and perform the debugging from
step 01. (Note: Cut off the power for the unit
before recharging the refrigerant to prevent the
unit entering into step 10 during
refrigerant-charging process)
db
ON
09
ON
OC
ON
The refrigerant volume for the system is normal.
After it displayes as the left method for 2s, it will
enter into the next determination automatically.
10_ Status determination for outdoor
unit’s valve before startup
db
ON
10
ON
ON
ON
Dermination status for valve of outdoor unit; After
compressor operating for about 2min, it will stop
operation. It will judge the ON status of gas valve
and liquid valve for outdoor unit. The judement
result is displayed as below:
db
ON
10
ON
U
6
ON
Valve for outdoor unit hasn’t been opened
completely. Short press SW6 button on main
board and the indicator will display “db 09 OC”
and then check whether gas valve and liquid valve
for outdoor unit are opened completely. After that,
short press
SW6 button on main board again.
After compressor is started up and operated for
about 2min, it will judge the status of valve again.
db
ON
10
ON
OC
ON
Normal status for valve. After it displays as the left
method for 2s, it will enter into the next
determina
tion automatically.
12_ Debugging confirmation for
the unit
db
ON
12
ON
AP
Flash
Wait for confirming the debugging order for the
unit. Short press
SW7 button on main bard to
confirm the debugging of unit. 2s later, the
indicator on main board will display as below:
db
ON
12
ON
AE
ON
Confirmation of startup of the unit. After
displaying for 2s, the system will select
“15_cooling ddebugging operation” or “16_heating
debugging operation”automatically according
ambient temperature to start up operation. If i
t
needs to add refrigerant because of engineering
requirement while the refrigerant hasn’t been
added finished before debugging, refrigerant can
be added through low
-
pressure detection valve
during operation process.
15_Debugging
operation for
cooling
db
ON
15
ON
AC
ON
Debugging under cooling mode. If there’s no
malfunction aft
er the compressor operates for
2
0min, it will enter into process 17 to finish
debugging; If there’s malfunction during operation
process, the display is as below:

Gree GMV-121WL/C-T Specifications

General

Brand	Gree
Model	GMV-121WL/C-T
Category	Air Conditioner
Language	English