Johnson Controls York YH9FYC24BAH-A-X - Error Codes and Indoor Display; Thermistor or Related Abnormality

Domestic air conditioner
Service diagnosis
17
10.3 Err or C odes and Description indoor displ ay
Code indication
Description
Reference
Page
indoor
Indoor Malfunction
E1 Room temperature sensor failure 17
71eruliafrosnesegnahcxe-taeH2E
81rorreMORPEEroodnI4E
81noitcnuflamrotomnafroodnI41E
The code indication that is listed above is the main fault
10.3.1 Thermistor or Related Abnormality
Indoor Display
E1: Room temperature sensor failure
E2: Heat-exchange sensor failure
Method of
The temperatures detected by the thermistors are used to determine thermistor errors
Malfunction
Detection
Malfunction
when the thermistor input is more than 4.92V or less than 0.08V during compressor
.noitarepo
noisiceD
Conditions
Note: The values vary slightly in some models
Supposed
■ Faulty connector connection
Causes
■ Faulty thermistor
■ Faulty PCB
Troubleshooting * Caution Be sure to turn off power switch before connect or disconnect connector, or else
parts damage may be occurred.
Thermistor resistance check
Is it normal?
Yes
NO
Yes
Is it normal?
NO
Check the connector connection.
Replace the thermistor
Replace the indoor unit PCB
Correct the connection