Gas heat pump-type air conditioner

A gas heat pump-type air conditioner that forms a cooling cycle by circulating refrigerant using a compressor having a gas engine as a power source, comprising:

• a first warning stage in which, when the cumulative hours of operation (t) of said gas engine has reached a first predetermined time (T1), the user is notified about the time for changing the engine oil by displaying a warning while continuing to operation said gas engine;
• a second warning stage in which, when said cumulative hours of operation (t) has reached a second predetermined time (T2), the user is notified about the time for changing the engine oil by displaying a warning while continuing to operate said gas engine when the cumulative hours of operation (t) of said gas engine has reached a second predetermined time (T2) and at the same time after the first stop procedure is carried out subsequent to having reached said second predetermined time (T2), in addition to displaying a warning the warning restoration operation procedure is carried out;
• a third warning stage in which, when said cumulative hours of operation (t) has reached a third predetermined time (T3), the user is notified about the time for changing the engine oil by forcibly reducing the engine revolutions of said gas engine to the minimum number of revolutions, and after the first stop procedure carried out subsequent to having reached said third predetermined time (T3), a warning is displayed and at the same time the warning restoration operation procedure is carried out;
• a fourth warning stage in which, when the cumulative hours of operation (t) of said gas engine has reached a fourth predetermined time (T4) and each time said cumulative hours of operation (t) is increased from the predetermined time (T4) by a predetermined time (Δt), the user is notified about time for changing the engine oil by forcibly reducing the engine revolutions of said gas engine to the minimum number of revolutions and at the same time after said fourth predetermined time (T4) has been passed, when the stop procedure is carried out, a warning is displayed and at the same time a warning restoration operation procedure is carried out;
• and
• a fifth warning stage in which, when said cumulative operation value (t) has increased from said fourth predetermined time (T4) to said fifth predetermined time (T5), the operation of said gas engine is forcibly stopped.