Control Of Outdoor Electric Heating Band; Drying Function - Gree Neo GWH09MA-A3DNA3A Installation, Service & Troubleshooting

Product Introduction
Basic Functions - 9K & 12K 230 volt

(11) Drying Function

You may start or stop the drying function under the modes of cooling and dehumidify at the starting status (The
modes of automatism, heating and air supply do not have drying function). When you start the drying function, after
stop the machine by pressing the switch button, you should keep running the inner fans for 2 minutes under low air
damper (The swing will operate as the former status within 2 minutes, and other load is stopped), then stop the entire
machine; When you stop the drying function, press the switch button will stop the machine directly. When you start
the drying function, operating the drying button will stop the inner fans and close the guide louver.
(12) Memory function when interrupting the power supply
Memory content: mode, swing function, light, set temperature and wind speed. After interrupted the power supply,
the machine will start when recovering the power according to the memory content automatically. If the last remote
control command has not set the timed function, the system will remember the last remote control command and
operate according it. If the last remote control command has set timed function and the power supply is interrupted
before the timed time, the system will remember the timed function of the last remote control command, the timed
time will recounted form power on. If the last remote control command has set timed function, the time is out and the
system is start or stop according to the set time when the power supply is interrupted, the system will remember the
operation status before the power supply was interrupted, and do not carry out timed action; The timed clock will not
remembered.

(13) Control of Outdoor Electric Heating Band

If not in heating mode or temp sensor has malfunction, electric heating bands of compressor and of condenser will
stop operation, otherwise, the below control logic will be followed.
1. Control of Compressor Electric Heating Band
a) Startup condition: compressor is powered off while outdoor ambient temperature≤23°F;
b) Stop condition: the compressor will be turned off under any of the condition;
i. Compressor is powered on:
ii. Compressor is powered off while outdoor ambient temperature≥28.4°F;
c) Outdoor ambient temp. sensor is with malfunction, the electric heating band will stop operation.
2. Condenser electric heating band control
1) When Toutdoor ambient≤33.8°F, the condenser electric heating band will start operation;
2) The chassis electric heating band will operate during the course from the unit starts defrosting to defrosting
finished and the compressor start operation, after 3mins operation of compressor and Toutdoor ambient≥37.4°F,
electric heating stop operation.
3) When Toutdoor ambient≥37.4°F, condenser electric heating band stop operation.
4) When 33.8°F<Toutdoor ambient<37.4°F, condenser electric heating band keep its original status.
When there's malfunction of outdoor ambient temp. sensor, the electric heating band stop operation and restart
operation 2mins later.
(14) Compulsory defrosting function
(1) Start up compulsory defrosting function
Under ON status, set heating mode with remote controller and adjust the temperature to 16OC. Press "+, -, +, -, +,-"
button successively within 5s and the complete unit will enter into compulsory defrosting status. Meanwhile, heating
indicator on indoor unit will ON 10s and OFF 0.5s successively. (Note: If complete unit has malfunction or stops
operation due to protection, compulsory defrosting function can be started up after malfunction or protection is
resumed.
(2) Exit compulsory defrosting mode
After compulsory defrosting is started up, the complete unit will exit defrosting operation according to the actual
defrosting result, and the complete unit will resume normal heating operation.
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