Basic Functions - 9K & 12K 115 Volt; Heating Conditions And Process; Defrosting; Blow Residual Heat - Gree Neo GWH09MA-A3DNA3A Installation, Service & Troubleshooting

Basic Functions - 9K & 12K 115 volt
6.2 Brief Description of Modes and Functions
1.Temperature Parameters
◆ Indoor preset temperature (Tpreset)
◆ Indoor ambient temperature (Tamb.)
2.Basic Functions
Once the unit energized,the compressor shall never be restarted except 3mins interval at least.For the first energization,if
the unit is at off status before power failure, the compressor can be restarted without 3-min delay. But if the unit is at ON
status before power failure, the compressor shall be restarted with 3mins delay. Once the compressor is started up, the com-
pressor won't stop running within 6mins with the change of room temperature.
(1)Cooling Mode
1. Under this mode, fan and swing function will be operating under setting mode, and temperature setting range is
61~86°F.
2. When outdoor unit is with malfunction or stop operation because of malfunction, indoor unit will keep its original op-
eration status and display the malfunction.
3. When 0°F≤(setting temperature-ambient temperature)<3.6°F, if indoor fan speed is at high level, it will turn to medium
level (when compressor is operating); if indoor fan speed is at ultra high level, it will not turn to other fan speed; when
(ambient temperature-setting temperature)≥1.8°F, the fan speed will resume to setting value.
(2) Dry Mode
1. Under this mode, fan will operate as low fan speed and swing at setting status, temperature setting range is 61~86°F.
2. When outdoor unit is with malfunction or stop operation because of malfunction, indoor unit will keep its original op-
eration status and display the malfunction.
(3) Heating Mode

1. Heating Conditions and Process

When the unit is powered on and is under heating mode, IDU will turn to anti cold wind function; when the unit is pow-
ered off and the indoor fan had ever turned on, the unit will turn to blowing residual heat.
2. When the compressor is running (doesn't include entering each malfunction and protection):
a. When Toutdoor amblent≥68°F, if the indoor fan speed is low or medium, the fan speed will switch to high speed;if the
fan speed is high or turbo, the fan speed will not change.
b. When Toutdoor amblent≤64°F, the fan speed will turn back to set fan speed;
c. When 64°F<Toutdoor ambient<68°F, the unit will run in present fan speed (set fan speed or high fan speed); but if the
unit quits anti cold wind for the first time in heating mode, the unit will run in set fan speed.

3.Defrosting

When there's too much frost on outdoor condenser, the complete unit will enter into defrosting automatically to assure the
best heating effect. During defrosting process, the heating indicator is on for 10s and off for 0.5s.

4.Blow Residual Heat

When heating temperature reaches to the temperature point of stop operation, compressor and outdoor fan will stop oper-
ation. The horizontal louver rotates to the defaulted position in cooling mode. Indoor fan will stop operation after operat-
ing at set fan speed for 60s. When the unit operates in heating or auto heating mode, compressor is started up and the unit
will stop operation after indoor fan starts operation. Compressor and outdoor fan stop operation. The horizontal louver
will rotate to the position of breeze (defaulted position in cooling). The unit will stop operation after indoor fan operates
at low fan speed for 10s. If the indoor fan stops due to blocking of PG motor, the louvers stop at the position when the unit
stops. (If the unit stops for other malfunction,the vertical louvers turn to cooling position 2) Indoor fan runs in set fan
speed for 60s and then stops.
Product Introduction
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