industrial heat exchanger for telecom cabinet

1.2 Alarm function There are three alarm functions as below: a) High temperature alarm: when the temperature of internal circling tuyere is higher than 60°C, high temperature alarm works. b) Fan alarm: when the fans of internal & external circling stop working , the fan alarm works. c) Low temperature alarm: when the temperature of internal circling tuyere is below -5°C, the low temperature alarm works. When the three alarms work , alarm indicator brights red. 1.3 Self Test function When pressing TEST button,the green LED lights , but do not flicker. Heat exchanger is self testing for three minutes, than green LED is off. 2 Control Panel There are 48V power port, MON alarm ports, three alarm indicators and one button in WS120F control panel.