J7" Malfunction Of Thermistor (R7T) For Outdoor Unit Liquid Pipe - Daikin VRV III-S RXYMQ36 48PVJU Service Manual

Troubleshooting by Indication on the Remote Controller
J7
3.25 " " Malfunction of Thermistor (R7T) for Outdoor Unit
Liquid Pipe
J7
Remote
Controller
Display
Applicable
RXYMQ36 · 48PVJU
Models
Method of Malfunction is detected from the temperature detected by the liquid pipe thermistor.
Malfunction
Detection
Malfunction
When a short circuit or an open circuit in the heat exchanger thermistor is detected
Decision
Conditions
 Faulty liquid pipe thermistor 1 (R7T)
Supposed
 Faulty outdoor unit PCB
Causes
 Defect of thermistor connection
Troubleshooting
Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged.
Confirm which thermistor is abnormal
using outdoor unit "monitor mode".
(Refer to P.105, 106)
for liquid pipe thermistor
connected to X13A on outdoor
measured after
removing the thermistor
(R7T) from outdoor unit PCB
normal? (3.5kW
∗ Refer to "Thermistor Resistance / Temperature Characteristics" table on P.241.
150
Is
the connector
NO
unit PCB
(A1P)?
YES
Is the
resistance
NO
to 360kW)
YES
Connect the connector and
operate unit again.
Replace the thermistor (R7T).
Replace the outdoor unit PCB
(A1P).
Troubleshooting
SiUS34-907