GREE GMV5 INDOOR UNIT SERVICE MANUAL
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only unit will display “nC”, heating only uint will display “nH”, swing type unit will display “nF”.
(3) Setting of power-fail memory function
Under power-off status, simultaneously press “Mode” button and “▲” button for 5 seconds to switch
the memory method: if “88” LED displays “on”, it means it will memorize the on and off status of the unit
after being de-energized (that is, after de-energizing and energizing the unit, the unit will resume to be
the status before it is de-energized); if “88” LED displays “oF”, it means it will not memorized the on and
off status of the unit after being de-energized (that is, after de-energizing and energizing the unit, the unit
will still be power-off status).
(4) Setting of master indoor unit function
Under power-off status, long press “Mode” button for 5 seconds to set the indoor unit to be master
pattern indoor unit (master indoor unit), after finishing setting, the “88” LED will display “UC” for 5 seconds.
Notes:
when the masterindoor unit is started up, the operational light “ ”on display panel will flicker for
three times.
(5) Settings of Child Lock Function
Under power-on or power-off status, simultaneously press “▲” button and “▼” button for 5 seconds,
it will turn on child lock function, the “88” LED will flicker and display “An” for three times; press “▲” button
and “▼” button again for 5 seconds, it will cancel child lock function.
Under child lock status, the unit will not response if pressing other buttons, and the “88” LED will
flicker and display “An” to remind the user that the unit is under child lock status.
(6) Long-distance Shielding Function
Long-distance shielding function: long-distance monitor or centralized controller can remotely control
related functions of indoor unit or conduct shielding to make the operation invalid, thus realize long-
distance control function.
Long-distance shielding function can be divided into full shielding and partial shielding. When it is in
full shielding, all the remote control or operation by pressing buttons to the indoor unit will be invalid. If it
is in partial shielding, the remote control or operation by pressing buttons to the shielded function of indoor
unit will be invalid.
When long-distance monitor or centralized controller conduct long-distance shielding to indoor unit,
if the user wants to remotely control or operate the unit by pressing buttons, the “88” LED will flicker and
display “Ay” to remind the user that it is under long-distance shielding status.
5 Introduction to Unit Functions
Function Application of IDUs
Indoor unit functions cover user operation functions and engineering application functions. For user
operation functions, refer to operating instructions of the IDU, wired controller, and remote controller.
Engineering application functions include:
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