Gree GMV-Pdm450W/NaB-M

136
DC Inverter Multi
VRF Service Manual
7�4 Dial-up of Unit
The DC inverter GMV unit of Gree is provided with three dial-ups, i.e. address dial-up, capacity dial-up and function
dial-up. Adjust the function dial-up to set control, mode and function; Adjust the address dial-up to set the corresponding
relationship of indoor unit and wired controller; Adjust the capacity dial-up to set capacity demand of indoor unit.
7.4.1 Function Dial-up
Caution!
Functional dial switch S7 is located on the mainboard of the indoor unit. It is operated when the user need to change
the default setting.
Functional dial switch S7
Dial-up Switch Functional Description:
Dial-up Setting
0 (ON Position) 1
1(S / R) Setting of memory mode Standby (S) Restore (R)
2(L / I) Setting of control mode Wired control (L) Remote control (I)
3(M / S) Setting of master / slave indoor unit Master indoor unit (M) Slave indoor unit (S)
4(I / O)
Setting of ambient temperature
acquisition point
Air inlet (I) Receiver (O)
5(L / H) Setting of high / low static pressure fan Low static pressure (L) High static(H)
Functional description of function dial-up:
Dial-up switch 1 (S/R):
Setting of memory mode, including the standby mode and restoration mode. The standby mode refers to that the
previous parameters will be kept but the unit will not run automatically after the power supply is resumed. This setting
is factory defaulted (dial-up switch pulled to “ON” position). For example, if the parameters of an indoor unit set before
power shutdown are High Fan and 24
, the unit will be under standby state after the power supply is resumed and after the
unit is manually started, the parameters will remain as High Fan and 24 . The restoration mode refers to that not only the
previous parameters will be kept, but also that the unit can start automatically after the power supply is resumed. But if the
unit is under STOP state before power shutdown, it will be also under STOP state after the power supply is resumed.
Dial-up switch 2 (L/I):
Setting of control mode, including wired control and remote control. The wired control mode refers to that the indoor
unit is controlled from wired controller (hand controller). This setting is factory defaulted (dial-up switch pulled to “ON”
position). When the setting is wired control mode, the function dial-up on S7 for “setting of memory mode” and “setting of
master / slave indoor unit” will be disabled. These two settings can be done from the wired controller directly. The remote
control mode refers to that the indoor unit is controlled from remote controller. When the setting is remote control mode,
its function dial-up must be set on S7.
Dial-up switch 3 (M/S):
The setting of master / slave indoor unit refers to the master / slave setting of indoor run mode, mainly used to meet
the needs of special people on priority (e.g. leader, patients, etc). The factory default setting is that all indoor units are
master (dial-up switch pulled to “ON” position).
When all the indoor units are set as slave, the outdoor unit will run according to the mode of slave indoor unit that
is rstly started. If the mode of slave indoor unit started later has in conict against the mode started earlier, the system
will display mode conict error, so that the indoor unit started later cannot work. In this case, the run mode of the unit is
decided by the slave indoor unit that is rstly started.
When only one indoor unit is set as master, no matter if the master indoor unit is rstly started or not, the slave indoor
unit will give out mode conict error as long as its mode is in conict against the mode of master indoor unit (except that
the master indoor unit is stopped). In this case, the unit run according to the mode of master indoor unit on priority.
When several indoor units are set as master, the mode of master indoor unit with a lower address code will be taken
as the master run mode of the unit. when the master indoor unit with the lowest address code is changed from STOP state
to RUN state, the mode of other master indoor units or slave indoor units shall be kept identical to its mode; otherwise the
system will give out mode conict error. Therefore, when there are several master indoor units, the address code of the unit
shall be set from lower to higher according to priority level.