Fujitsu UTP-VX90A User Manual

DC
CN147
THERMISTOR THERMISTOR
(SUC. TEMP.)
< TH4 >
(HEX. TEMP.)
< TH5 >
BLACK BLACK
1 2 3 4
1 2 3 4
BLACK BLACK
Heat exchanger liquid temperature
thermistor
Heat exchanger liquid temperature thermistor short or open detected
1. Connector connection defective, open
2. Thermistor defective
3. Main PCB defective
OK
OK
Check Point 1 : Check the connector connection and cable open
Connector connection state check
Cable open check
Check Point 2 : Check the thermistor
Thermistor characteristics check (Disconnect the thermistor from the PCB and check.)
* For the thermistor characteristics, refer to the "Service Parts Information 17".
Check Point 3 : Check voltage of Main PCB (DC5.0V)
Main PCB (CN147:3-4) voltage value = 5V
Remove the thermistor from Main PCB, check the voltage.
Heat exchanger liquid temperature sensor (CN147:3-4)
Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash,
Filter LED Continuous Flash.
Outdoor Unit : E. 73. 3
Error Code : 73
If the voltage does not appear, replace Main PCB and set up orignal address.If the voltage does not appear, replace Main PCB and set up orignal address.
Heat Ex. Liquid pipe Temp.
Sensor Error<TH5>
Trouble shooting 43
Indicate or Display:
Detective Actuators:
Detective details:
OUTDOOR UNIT Error Method:
Forecast of Cause :
E. 73.3
04-51

Fujitsu UTP-VX90A Specifications

General

Brand	Fujitsu
Model	UTP-VX90A
Category	Air Conditioner
Language	English