Thermistors In Rxn,Rxb,Rxc,Arxn,Arxb; Minimum Off Time Control; Auto Restart; Auto Random Restart - Daikin FTXN25L Service Manual

2.10 Thermistors in RXN, RXB, RXC, ARXN, ARXB
COOLING OPERATION
HEA
INDOOR UNIT
Functions of Thermistor
Thermistor
Discharge pipe
Outdoor coil
Outdoor air
Heat sink
Suction pipe

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:
TING OPERATION
PIPING
GAS
3 WAY VALVE
DISCHARGE PIPE
THERMISTOR
PIPING
LIQUID
2 WAY
VALVE
Functions
Used for discharge superheat (SH) & Electronic Expansion Valve (EXV) control.
Used for defrost control. Also used for inverter current protection control in Series II.
Used for defrost & outdoor fan speed control. Also used for overall current protection
& preheating operation control.
Used for capturing heat sink temperature. (Applicable for Daikin controller)
Used for Electronic Expansion Valve (EXV) & suction pipe (SH) protection control in
heating.
FOR ILLUSTRATIVE PURPOSES ONLY
MUFFLER
ACCUMULATOR
COMPRESSOR
ELECTRONIC
EXPANSION VALVE
STRAINER
STRAINER
Algorithm & Control
OUTDOOR UNIT
22