Troubleshooting 27 - Outdoor Unit Error Method: Rcv Liquid Surface Sensor 2 (Middle Limit) Error - Fujitsu Airstage V series Service Manual

Trouble shooting 27
OUTDOOR UNIT Error Method:
RCV Liquid Surface Sensor 2
(Middle Limit) Error
Detective Actuators:
Outdoor Unit Controller PCB circuit
RCV Liquid Surface Detection Thermistor
Forecast of Cause : 1. Connector connection failure 2. Thermistor failure 3. Controller PCB failure
Check Point 1 : Check connection of Connector
p Check if connector is loose or removed
p Check erroneous connection
p Check if thermistor cable is open
>>Reset Power when reinstalling due to removed connector or incorrect wiring.
OK
Check Point 2 : Remove connector and check Thermistor resistance value
Thermistor Characteristics (Rough value)
Temperature (°C)
Resistance Value ( )
If Thermistor is either open or shorted, replace it and reset the power.
OK
Check Point 3 : Check voltage of Controller PCB (DC5.0V)
Make sure circuit diagram of each indoor unit and check terminal voltage at Thermistor (DC5.0V)
Outdoor Unit Schematic(CN38)
RCV Liquid Surface Thermistor 1(CN38:1-2)
RCV Liquid Surface Thermistor 2(CN38:3-4)
RCV Liquid Surface Thermistor 3(CN38:5-6)
SC Heat Exchanger Gas Outlet Temp. Thermistor(CN38:7-8)
Heat Exchanger Temperature Thermistor 1 (CN38:9-10)
If the voltage does not appear, replace Controller PCB and reset the original address.
Indicate or Display:
Outdoor Unit : LED1 Flash, LED3
Indoor Unit : Operation LED Lighted Continuously (Normal Operation)
ERROR CODE : E : 00
Detective details:
RCV Liquid Surface Detection Thermistor 2 (Middle Limit) is detected as either
SHORTED or OPEN.
-10 -5.0 0
27.5 20.9 16.1
6 Times Blink
(No error display)
5.0 10 15.0
12.4 9.7 7.7
DC
06-38
20 25.0 30
6.1 4.9 3.9