Gree GUHN48NM3A1O - Indoor Unit Installation

45
U-MATCH Air
Conditioners
Service Manual
DPOUSPM
Note: When connecting the unit with new panel to wired remote controller, the control panel should be set as an
slave controller; otherwise the unit can not be normally operated.
Instructions to the Error Indicating Lamps on the Dash Receiver of the Cassette Type Unit
Power and ON/OFF Indicating Lamp:
It goes red when the unit is powered on while it goes white when the unit is started.
Timer Indicating Lamp:
It goes on when the timer is set and goes off when it is not. Its display is in yellow.
“88” Display: When there is no error, and it receives valid remote control information. It will display the
temp setup for 5s, then display the temp of indoor. When the unit has error, It will display the error code. When
there are more than one error, the error code will be displayed alternately.
After the grille of the front panel is opened, the front panel is still allowed to realize the following functions
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Receiver “Auto” Button“88” Display
Timer Indicating Lamp Power Indicating Lamp“ Test” Button
(1). Three Grades of Speed for Indoor Fan: this function is unavailable for the unit.
(2). Memory Function: If memory is set, indoor unit will resumer original setting state after power failure and
then power recovery. If not, indoor unit is defaulted to be off after power recovery.
(3). Module Control: when the wired controller is to be connected with the unit, it should be set at the slave
controller mode.
See the following statement for how to set it:
“L1”will appear on the “88” display by pressing the “Auto” and “Test” buttons simultaneously when the unit
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selected option should be made by pressing the “Test” button.
“L1” indicates the options of the fan speeds;
“L2” indicates the s
witchover of the memory function;
“L3” indicates the options of the control modes.
Next, it will go to the next step where “01” or “02” is displayed on the “88” display, then, press the “Test”
/ “Auto” button to select the desired option, each press on the “Test” button making the displayed number
increase by 1 and each press on the “Auto” button making the displayed number decrease by 1. After that, quit
the setting status and the save the set parameter by pressing the “Auto” and “Test” buttons simultaneously for