Gree GWH12TB-D3DNA1A - Other Controls

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(6) Common Protection Functions and Fault Display under COOL, HEAT, DRY and AUTO Modes
ķ
Overload protection
T tube: measured temperature of outdoor heat exchanger under cooling mode; and measured temperature of indoor heat exchanger
under heating mode.
1) Cooling overload
a. If T tube≤125.6
o
F, the unit will return to its original operation state.
b. If T tube≥131
o
F, frequency rise is not allowed.
c. If T tube≥136.4
o
F, the compressor will run at reduced frequency.
d. If T tube≥143.6
o
F, the compressor will stop and the indoor fan will run at preset speed.
2) Heating overload
a. If T tube≤122
o
F, the unit will return to its original operation state.
b. If T tube≥127.4
o
F, frequency rise is not allowed.
c. If T tube≥132.8
o
F, the compressor will run at reduced frequency.
d. If T tube≥140
o
F, the compressor will stop and the indoor fan will blow residue heat and then stop.
ĸ
Exhaust temperature protection of compressor
If exhaust temperature ≥208.4
o
F, frequency is not allowed to rise.
If exhaust temperature ≥217.4
o
F, the compressor will run at reduced frequency.
If exhaust temperature ≥230
o
F, the compressor will stop.
If exhaust temperature ≤194
o
F and the compressor has stayed at stop for at least 3 minutes, the compressor will resume its operation.
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Communication fault
ĺ
Module protection
Under module protection mode, the compressor will stop. When the compressor remains at stop for at least 3 minutes, the compressor
will resume its operation. If module protection occurs six times in succession, the compressor will not be started again.
Ļ
Overload protection
If temperature sensed by the overload sensor is over 239
o
F, the compressor will stop and the outdoor fan will stop with a time lag of 30
seconds. If temperature is below 203
o
F, the overload protection will be relieved.
ļ
DC bus voltage protection
If voltage on the DC bus is below 150V or over 420V, the compressor will stop and the outdoor fan will stop with a time lag of 30
seconds. When voltage on the DC bus returns to its normal value and the compressor has stayed at stop for at least 3 minutes, the
compressor will resume its operation.
3. Other Controls
(1) ON/OFF
Press the remote button ON/OFF: the on-off state will be changed once each time you press the button.
(2) Mode Selection
Press the remote button MODE, then select and show in the following ways: AUTO, COOL, DRY, FAN, HEAT, AUTO.
(3) Temperature Setting Option Button
Each time you press the remote button TEMP+ or TEMP-, the setting temperature will be up or down by 33.8
o
F. Regulating
Range: 60.8 - 86
o
F, the button is useless under the AUTO mode.
(4) Time Switch
You should start and stop the machine according to the setting time by remote control.
(5) SLEEP State Control
a. When the air conditioner is under the mode of COOL, DRY, and the SLEEP mode has been set well, after the SLEEP state keeps
about 1 hour, the pre-setting T will raise 33.8
o
F, and it will raise 33.8
o
F again after 2 hours, so it raise 35.6
o
F in 2 hours, then it will run on
at the setting temperature and wind speed.
b. When the air conditioner is under the mode of HEAT, and the Timer has been set well, after the SLEEP state keeps about 1 hour,
the pre-setting T will reduce 33.8
o
F, and it will reduce 33.8
o
F again after 2 hours, so it reduce 35.6
o
F in 2 hours, then it will run on at the
setting temperature and wind speed.
c. The setting temperature keeps the same under the FAN mode and AUTO mode.