GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
87
basic modules are displayed as follows:
LED1
LED2
LED3
Function Code
Display Mode Refrigerant Recovery Code Display Mode
Current Status
Display Mode
A2
On
01
On
[Module low-pressure Ps]
On
LED3 shows the low-pressure value of a module. If the value is negative, LED3 circularly displays
the negative code "nE
” and the numeric value every one second. For example, for -30
C, LED3
alternately displays
“nE” for one second and then “30” for another second.
Step 4: Close liquid-tube stop valves of all basic modules of the ODU. When the low-pressure value
displayed on LED3 continually blinks, quickly close air-tube stop valves of all basic modules and then
press "SW7" on the master unit to confirm completing refrigerant recovery or power off the entire unit.
If no operations are performed after the low-pressure value displayed on LED3 continually blinks for
three minutes, the entire unit will be forcibly stopped.
On the master unit, press "SW6" to return to the upper level for restoring the standby status of the
entire unit (press "SW6" in setting status to return to the upper level; press "SW6" after settings are
completed to restore the normal operating status of the unit).
Note:
Another startup is not allowed within 10 minutes after refrigerant recovery.
Basic module refrigerant recovery
Step 3: Set the basic module requiring refrigerant recovery to module emergency operation status
and close the liquid-tube stop valve of the emergency status module. Select "02
” as in step 2 to enter
basic module refrigerant recovery. The display is as follows:
LED1
LED2
LED3
Function Code
Display Mode
Current Progress
Display Mode
Current Status
Display Mode
A2
On
02
On
Module high-pressure
On
LED3 shows the high-pressure value of the module.
Step 4: When the high-pressure value displayed on LED3 continually blinks (displayed as 0
C if the
high pressure is less than 0
C), quickly close the air-tube stop valve of the emergency module and then
press "SW7" on the master unit to confirm completing refrigerant recovery or power off the entire unit.
If no operations are performed after the high-pressure value displayed on LED3 continually blinks
for three minutes, the entire unit will be forcibly stopped.
On the master unit, press "SW6" to return to the upper level for restoring the standby status of the
entire unit (press "SW6" in setting status to return to the upper level; press "SW6" after settings are
completed to restore the normal operating status of the unit).
Note:
Before the basic module refrigerant recovery operation, users must close the liquid-tube stop
valve of the basic module requiring refrigerant recovery.
Another startup is not allowed within 10 minutes after refrigerant recovery.
④
A8 Aftersales vacuuming mode settings
Step 1: Confirm entering the A8 aftersales vacuuming mode settings. The master unit is displayed
as follows:
LED1
LED2
LED3
Function Code
Display Mode
Current Progress
Display Mode
Current Status
Display Mode
A8
On
00
Blinking
OC
Blinking
