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2.10 Thermistors in RXN, RXB, RXC, ARXN, ARXB
Functions of Thermistor
Thermistor Functions
Discharge pipe Used for discharge superheat (SH) & Electronic Expansion Valve (EXV) control.
Outdoor coil Used for defrost control. Also used for inverter current protection control in Series II.
Outdoor air
Used for defrost & outdoor fan speed control. Also used for overall current protection
& preheating operation control.
Heat sink Used for capturing heat sink temperature. (Applicable for Daikin controller)
Suction pipe
Used for Electronic Expansion Valve (EXV) & suction pipe (SH) protection control in
heating.
2.11 Minimum Off Time Control
To prevent frequent compressor ON/OFF & to allow pressure equalization
• The compressor will be on 3 minutes stand-by after turning OFF before it is allowed to turn ON.
• Outdoor fan OFF delay to improve pressure equalization & to prevent refrigerant from entering into
evaporator.
2.12 Auto Restart
Factory pre-set.
Allow unit to automatically resume the same operating mode it was in before a power failure.
2.13 Auto Random Restart
Unit restarts automatically in 64 different recovery timing patterns (within 180 seconds to 244 seconds) and
operates based on the previous setting (operating mode, temperature setting and fan speed).
To disable the auto random restart function, cut off the jumper J_AUTO as highlighted in attachment.
Please be informed that after disable auto random restart, unit is not able to restart with last state memory
after power resume from failure. Unit will revert to default setting as below:
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