Thermistors In Arxn/Rxn_L/M, Rxb_B; Minimum Off Time Control - Daikin FTXB50BV1B Service Manual

Function & Control

2.8 Thermistors in ARXN/RXN_L/M, RXB_B

INDOOR UNIT
Functions of Thermistor
Thermistor
Discharge pipe
Outdoor coil
Outdoor air
Heat sink
Suction pipe

2.9 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.
• OD fan OFF delay to improve pressure equalization & to prevent refrigerant from entering into evaporator.
PIPING
GAS
3 WAY VALVE
4 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.
ACCUMULATOR
COMPRESSOR
ELECTRONIC
EXPANSION VALVE
STRAINER STRAINER
OUTDOOR UNIT
COOLING OPERATION
HEATING OPERATION
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