Troubleshooting by Indication on the Remote Controller ESIE09-05
174 Troubleshooting
3.8 “C4” AHU: Malfunction of Thermistor (R2T) for Heat
Exchanger
Remote
Controller
Display
C4
Applicable
Models
All AHU models
Method of
Malfunction
Detection
Malfunction detection is carried out by temperature detected by heat exchanger thermistor.
Malfunction
Decision
Conditions
When the heat exchanger thermistor becomes disconnected or shorted while the unit is running.
Supposed
Causes
Defect of thermistor (R2T) for liquid pipe
Defect of AHU PC board
Troubleshooting
∗ Refer to thermistor resistance / temperature characteristics table on P232.
(V2784)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Replace the AHU PC board.
Connect the thermistor and turn
on again.
NO
NO
Replace the thermistor (R2T).
YES
YES
Connector
is connected to X12A
of the AHU PC
board.
Resistance
is normal when
measured after
disconnecting the thermistor
(R2T) from the AHU
PC board
(3.5kΩ~
360kΩ)
Все каталоги и инструкции здесь: http://splitoff.ru/tehn-doc.html
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