Why is the Timer LED blinking on my Carrier Air Conditioner?
If the timer LED is blinking on your Carrier Air Conditioner, it could indicate a faulty return air sensor, a faulty return indoor coil sensor, or a faulty return outdoor coil sensor. Determine the reason and replace the faulty component.
Why is the Power LED blinking on my Carrier 42QH30-H?
If the power LED is blinking on your Carrier Air Conditioner, it could be due to compressor overheat, anti-overheat protection being active, or low ambient temperature. Determine the reason and correct the issue.
General| Brand | Carrier |
|---|---|
| Model | 42QH30-H |
| Category | Air Conditioner |
| Language | English |
Important safety advice for service and maintenance personnel.
Details warranty exclusions for misuse, accidents, modifications, and improper installation/maintenance.
Describes return air, supply air, indoor unit functions, and drain hose.
Details remote control functions and refrigerant piping lines.
Lists components and location of the outdoor unit.
Explains the coding system for unit model designation.
Defines the codes for Unit Type (Heat Pump/Cool Only).
Lists part numbers and IDs for indoor and outdoor units.
Specifies max/min indoor/outdoor temps for cooling and heating.
Details nominal, minimum, and maximum voltage requirements.
Lists protection types, activation, and defrost cycle behavior for heat pump systems.
Shows the wiring connections for the indoor heat pump unit.
Shows the wiring connections for the indoor cool-only unit.
Displays the outdoor heat pump unit wiring diagram.
Displays the outdoor cool-only unit wiring diagram.
Illustrates field electrical connections for the heat pump system.
Illustrates field electrical connections for the cool-only system.
Explains the numbering and symbols used in the connection diagrams.
Shows the refrigerant flow for the heat pump system.
Shows the refrigerant flow for the cool-only system.
Introduces the importance of the self-diagnostic function for heat pump systems.
Lists detected components and their indicator status for malfunctions.
Instructions on how to remove air filters for cleaning.
Steps for cleaning acrylic-fiber air filters.
Reminders about filter placement and checks after cleaning.
Lists monthly, 4-monthly, and yearly checks for the indoor unit.
Lists monthly, 4-monthly, and yearly checks for the outdoor unit.
Addresses issues when the compressor and outdoor fan fail to start.
Deals with overload cycling, continuous operation, and excessive head pressure.
Troubleshoots scenarios where the fan runs but the compressor does not.
Addresses low head pressure and low/excessive suction pressure.
Troubleshoots outdoor fan issues and remote control display/response failures.
Deals with remote control function requests not being acknowledged by the unit.
Troubleshoots the air conditioner failing to start and insufficient cooling.
Addresses insufficient heating, mist, noises, and unpleasant smells.
Explains normal heating start-up and reasons for blinking timer/power LEDs.
To Next Page
