Troubleshooting
9.2.3.3 Diagnosis of high temperatureǃoverload protection (Check outdoor unit when cooling and indoor unit when
heating)
Indoor unit display: H4 (dual-8 display), heating indicator is off for 3S and blinks 4 times.
Main detection points:
Ɣ Is the indoor and outdoor ambient temperature in normal range?
Ɣ Is the indoor and outdoor fan running normally?
Ɣ Is the radiating environment of indoor and outdoor unit OK?
Ɣ Is the indoor and outdoor pipe temperature sensor normal?
Malfunction diagnosis process:
48127 Fahrenheit
48
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