To balance device wear and tear,
- If only one drain pump is required, use the fault-free pump. If both can operate normally, use the one with the least amount of operation time. If errors occur during operation, switch to the other pump.
- Switch to another pump every set period. When both drain pumps can work normally but only one is needed, set an interval of, for example, six hours, to recalculate the operation time of both pumps and select the one with the least operation time. This prevents the system from using or keeping a drain pump running for a long time.