Daikin ALTHERMA HT EKBUHAA6 V3 - CA Indoor Unit: Leaving Water Thermistor Error (R5 T)

ESIE09-08A Troubleshooting by Indication on the Remote Controller
Troubleshooting 153
3.10 “CA ” Indoor Unit: Leaving Water Thermistor Error (R5T)
Remote Control
Display
CA
Subcode 0
Applicable Models AII indoor unit models
Method of
Malfunction
Detection
Malfunction detection is carried out by temperature detected by leaving water temperature thermistor.
Malfunction
Decision Conditions
When the leaving water temperature thermistor becomes disconnected or shorted while the unit is
running.
Supposed Causes  Defect of indoor unit thermistor for leaving water (R5T)
 Defect of indoor unit PC board (A1P)
Troubleshooting
 Refer to thermistor resistance / temperature characteristics table on P251.
Caution
Be sure to turn off power switch before connecting or disconnecting connector,
otherwise parts may be damaged.
Replace the indoor unit PC board (A1P).
Connect the thermistor and turn
on again.
NO
NO
Replace the thermistor (R5T).
YES
YES
Connector
(X17A) is connected to
the indoor unit PC
board.
Resistance
is normal when
measured after
disconnecting the thermistor
(X17A) from the indoor unit
PC board.
(7.2k
~112k )
(V2786)
Faulty thermistor
value > 95 C
Bad wire connection
value < -43.6 C