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MULTI V 5 Outdoor Unit Service Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
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ERROR CODES
Please refer to the Safety Precautions on pages 4-7 for more detail to prevent injury or death regarding the operation and service
troubleshooting of the Multi V product.
WARNING
Error No. Description Details Causes
04
Indoor unit drain
overflow error.
Drain pump and / or float switch could be
malfunctioning. Also check if the drain line is
obstructed.
1. Drain pump / float switch error.
2. Improper drain pipe location, clogged drain
pipe.
3. Indoor unit PCB error.
Is the drain pan filled half-
way with water? (Float is halfway
up to the float switch.)
Remove any debris and clean the pump.
Replace the float switch.
No
Yes
Yes
Is the drain pump
operating? (Sound / drain noise /
contact / etc.)
Is the drain pump clogged?
Yes
Is the float switch
resistance short when
measured?
Replace the indoor unit PCB or reconnect the
connector.
Yes
For the indoor unit
PCB, does the voltage have
the correct output?
No
Replace the drain pump.
Yes
No
Replace the indoor unit PCB.
No
Check the height and slope of the
drain head.
* If the float rises higher than half its
height, then the circuit opens and the
unit automatically stops.
No
Error No. 04
Images here are representative
of system components. Actual
component appearance depends
on model and system type.