C5" Indoor Unit: Malfunction Of Tank Thermistor (R2T) - Daikin ERSQ 011AAV1 Service Manual

Troubleshooting by Indication on the Remote Controller
"C5 " Indoor Unit: Malfunction of Tank Thermistor (R2T)
3.7
C5
Remote Control
Display
Subcode 0
Applicable
All indoor unit models
Models
Method of Malfunction detection is carried out by temperature detected by tank thermistor.
Malfunction
Detection
Malfunction
When the tank thermistor becomes disconnected or shorted while the unit is running.
Decision
Conditions
Supposed
Causes
Troubleshooting
∗ Refer to thermistor resistance / temperature characteristics table on P229.
138
Defect of indoor unit tank thermistor (R2T)
Defect of indoor unit PC board (A3P)
Be sure to turn off power switch before connecting or disconnecting connector,
Caution
otherwise parts may be damaged.
Check if
NO
DHW option is
turned rightful active
[6-00].
YES
Connector
is connected to
NO
X11A of the indoor unit
PC board A3P.
YES
Resistance
is normal
when measured after
NO
disconnecting the thermistor
(R2T) from the indoor
unit PC board.
(1.6k ~360k )
YES
Make setting, restart unit.
Bad wire connection
Connect the thermistor and turn
value < -35.7˚C
on again.
Faulty thermistor
Replace the thermistor (R2T).
value > 90˚C
Replace the indoor unit PC board (A3P).
ESIE09-08
(V2785)
Troubleshooting