Gree U-Match 6 Series

GREE U-Match 6 SERIES UNIT SERVICE MANUAL
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frequency.
2.2.2.3 Refrigerant Recovery Control
Enabling method: Remote controller and wired controller both use the same enabling method. That is,
within 5min after power is connected, start cooling mode (turn on the unit) and set temperature at 16
℃
,
then press “
＋
,
－
,
＋
,
－
,
＋
,
－
” (6 times of pressing) in 5s to enter the refrigerant recovery mode. If it
is successfully enabled, the indoor unit will display the corresponding code Fo.
After the refrigerant recovery mode is enabled, if remote controller or wired controller sends a signal
or the refrigerant recovery mode has been enabled for 10min, system will exit from refrigerant recovery. If
outdoor unit is shut down because of malfunction, refrigerant recovery will be stopped immediately.
Please note that refrigerant recovery mode cannot be enabled under the following conditions:
1. If temperature is shielded remotely, refrigerant recovery mode cannot be enabled. You need to first
unlock the remote shield against temperature.
2. If temperature is higher than 16 degrees under energy-saving mode, refrigerant recovery mode
cannot be enabled. You need to first turn off the energy-saving mode.
2.2.2.4 Forced Operation Control
This control is used to quickly check whether the unit can operate normally after installation. Wired
controller has to be used to enable this control. For cassette type unit, you can enable the control through
the light board.
Enabling method through the light board of cassette type unit: After the unit is installed and
connected to power, press TEST button on the light board to enter forced operation mode. Short-press
TEST button (less than 2s), cooling mode will be activated. Long-press TEST button (more than 2s),
heating mode will be activated.
Enabling method through wired controller:
Under power-on status,
Forced cooling: press the “
－
” button continuously for 5s to enter the forced test mode.
Forced heating: press the “
＋
” button continuously for 5s to enter the forced test mode.
During test mode, press any button to quit the test mode.
Note:
Forced test mode can only be enabled when the unit is first turned on and not yet receives any
remote controller signal or button control signal.