... one master units could with 7slave units central air conditioner, Modular air source heat pump(60kw,80kw,100kw-825kw ... protection breaker, fan protection breaker, phase sequence relay and microprocessor with function display (display only for master/packaged ... villas, hospitals, cinemas, stadiums, recreations, office blocks, factories and so on., central air conditioner(modular air source heat pump)