Carrier 38VMH-1P Service Manual page 48

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P8: FAN SPEED EXCEEDS TARGET FAN MOTOR ROTATION FOR FIVE SECONDS OR MORE
DEFINITION
• When fan speed exceeds minimum target fan motor rotation (500 RPM) for five seconds or more, protection is activated.
• System will restart once the fan speed is < 400 RPM.
POSSIBLE CAUSES
Fan speed exceeds the target fan motor rotation due to excessive wind.
PE: HIGH INDOOR COIL TEMPERATURE (T2A) PROTECTION
DEFINITION
• High indoor coil temperature (T2A) protection is activated when coil temperature is higher than 144°F.
• The unit will restart once the coil temperature (T2A) is below 109.4°F.
POSSIBLE CAUSES
• Air filter or indoor coil are dirty
• Temperature sensor (T2A) error
• Other heat resources around T2A
• Damaged main board of indoor unit
A210290
Fig. 55 —P8 Troubleshooting Chart
*A Refer to resistance of temperature sensor in Appendix.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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