Discharge Pipe Temperature Control - Daikin SUPER MULTI NX CTXS07JVJU Service Manual

SiUS12-928_B

6.12 Discharge Pipe Temperature Control

F3
Remote
Controller
Display
j
Outdoor Unit LED A
Display
Method of
Detected by the discharge pipe thermistor
Malfunction
Detection
 If the temperature detected by the discharge pipe thermistor rises above
Malfunction
Decision
 The error is cleared when the discharge pipe temperature is dropped below
Conditions
248°F(120°C)
 If the error repeats, the system is shut down.
 Reset condition: Continuous run for about 60 minutes without any other error
 Defective discharge pipe thermistor
Supposed
Causes
 Defective outdoor electronic expansion valve or coil
 Refrigerant shortage
 Defective four-way valve
 Water mixed in refrigerant
 Defective stop valve
 Defective outdoor unit PCB
Troubleshooting
Check No.01
Refer to P.191
Check No.12
Refer to P.194
Check No.14
Refer to P.195
Service Diagnosis
i h i h
1 2 3 4
stops.
A B
224.6°F(107°C)
(Defective outdoor heat exchanger thermistor or outdoor temperature thermistor)
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Check No. 01
Check the thermistors.
OK
Check No. 12
Check the outdoor electronic
expansion valve.
OK
Check No. 14
Check the refrigerant line.
OK
NG
* Discharge pipe thermistor
* Outdoor heat exchanger thermistor
* Outdoor temperature thermistor
NG
NG
* Refrigerant shortage
* Four-way valve
* Water mixed
* Stop valve
Troubleshooting for Outdoor Unit
, the compressor
A
B .
Replace the defective
thermistor.
Replace the outdoor
electronic expansion valve
or the coil.
Refer to the refrigerant line
check procedure.
Replace the outdoor unit
PCB.
(R15286)
172