Troubleshooting Tips - Keystone KSTAW12INV-HC User Manual

TROUBLESHOOTING TIPS

Before calling for service, review this list. It may save you time and money. This list includes common
occurrences that are not the result of defective workman-ship or materials in this appliance.
Problem
Air conditioner
does not start
Air from unit does
not feel cold
enough
Air conditioner
cooling, but room
is too warm- ice
forming on cooling
coil behind
air filter.
Air conditioner
cooling, but room
is too warm- NO
ice forming on
cooling coil behind
air filter.
Air conditioner
turns on and off
rapidly
Noise when unit is
cooling
Solution
Wall plug disconnected. Push plug firmly into wall outlet.
House fuse blown or circuit breaker tripped. Replace fuse with time delay type or reset
circuit breaker.
Plug Current Device Tripped. Press the RESET button.
Power is OFF. Turn power ON.
Room temperature below 60°F(16°C). Cooling may not occur until room temperature rises
above 60°F(16°C).
Temperature sensor behind the air filter is touching the cold coil. Try to move it so it does
not contact the cold coil.
Set to a lower temperature.
Compressor stopped when changing modes. Wait for 3 minutes after set to the COOL mode
Check for potential obstructions blocking the outdoor intake/exhaust. Clear any obstructions.
Outdoor temperature below 64°F(18°C). To defrost the coil, set FAN ONLY mode.
Air filter may be dirty. Clean filter. Refer to Care and Cleaning section. To defrost, set to
FAN ONLY mode.
Thermostat set too cold for night-time cooling. To defrost the coil, set to FAN ONLY mode.
Then, set temperature to a higher setting.
Dirty or restricted air filter. Clean air filter. Refer to Care and Cleaning section.
Temperature is set too high, then, set temperature to a lower setting.
Air directional louvers positioned improperly. Position louvers for better air distribution.
Front of units is blocked by drapes, blinds, furniture, etc. - restricts air distribution. Clear
blockage in front of unit.
Any open doors, windows, or registers may allow cold air to escape. Close any doors,
windows, or registers.
The room may be too warm. Allow additional time to remove "stored heat" from walls,
ceiling, floor, and furniture.
Dirty or restricted air filter. Clean air filter.
Outside temperature extremely hot. Set FAN speed to a higher setting to bring air past
cooling coils more frequently.
Check for potential obstructions blocking the outdoor intake/exhaust. Clear any obstructions.
It is normal to hear the airflow. If too loud, set to a slower FAN setting.
Window vibration - poor installation. Refer to installation instructions or check with installer.
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