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Daikin VRV III-S RXYMQ36 48PVJU Service Manual Page 136

60 hz.
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SiUS34-907
C9
3.11 "
" Malfunction of Thermistor (R1T) for Suction Air
C9
Remote
Controller
Display
Applicable
All indoor unit models
Models
Method of
Malfunction detection is carried out by temperature detected by suction air temperature thermistor.
Malfunction
Detection
Malfunction
When the suction air temperature thermistor becomes disconnected or shorted while the unit is
Decision
running
Conditions
 Defect of connection of thermistor
Supposed
 Defect of indoor unit thermistor (R1T) for air inlet
Causes
 Defect of indoor unit PCB
Troubleshooting
Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be
Caution
damaged.
Remove the thermistor from the
indoor unit PCB, and then insert it
again.
Remove the thermistor from the
indoor unit PCB, and then make
resistance measurement of the
thermistor using a multiple meter.
∗ Refer to "Thermistor Resistance / Temperature Characteristics" table on P.241.
Troubleshooting
Is the
thermistor normal?
NO
*
7.2 kW to 112 kW
YES
Troubleshooting by Indication on the Remote Controller
YES
NO
Normal (The malfunction is
caused by faulty contact.)
Replace the thermistor (R1T).
Replace the indoor unit PCB.
127

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