| 摘要 |
PROBLEM TO BE SOLVED: To select display or non-display of warning about the need for maintenance etc., which conforms to a service system in the area where an engine heat pump is arranged. SOLUTION: The presence or absence of warning display is set by a power supply frequency discriminating means 70. Warning display is performed, when the total operating hours of an engine heat pump has reached a set value. Warning display is performed, when the total operating rotation speeds reach a set value. In determining the total rotation speeds, the total rotation speeds are converted into a reference rotation speed, by multiplying the reference rotation speed with the weighing factors or the rations of the respective operating rotation speeds, and are calculated. When there is a separate lubrication oil tank, and when the quantity of oil fed from the separate lubrication oil tank to an oil pan reaches a set value, warning display is performed.
|
