HEX050QA Heat Exchanger Instruction Manual
Page 4
LED indicator
INNER FAN / OUTER FAN / STATUS LEDs indicate fan and NTC
sensor status .
Depress "TEST" button to start auto-test of outer and inner fans
running from low to high speed. Turn off by depressing the “TEST” button
again .
INNER FAN
OUTER FAN
STATUS
Normal
GREEN
GREEN
GREEN
Failed*
RED
RED
RED
Normal
(touch TEST / CLEAN)
Blinking
GREEN
Blinking
GREEN
N/A
Failed*
(touch TEST / CLEAN)
Blinking
RED
Blanking
RED
N/A
* FAN failed : Fan speed is lower than 50% of definition or fan is locked
* STATUS Failed : NTC resistance is over range such as “open circuit” or
“short circuit”
4-2. Standalone control mode
HEX can detect ambient temperature to control cooling capacity ,
both internal fan and external fan speed default setting are shown as below
Cooling capacity (W/K) vs. Temperature