Installation Manual Serena Series
10. LEDs on the Main Control Board and
the remote wall mount Timer Switch
flashes: 0.5 seconds On / 0.5 seconds
O / 0.5 seconds On / 0.5 seconds O
/ 0.5 seconds On / 0.5 seconds O /
0.5 seconds On / 0.5 seconds O /
0.5 seconds On / 0.5 seconds O /
0.5 seconds On, 2 seconds O, then
repeats the cycle
Replace the temperature sensor
Note
Lightning, high power surge or high frequency radio signals could cause ERV to go into safe mode (unit complete shuts o and
timer switch blinks either two or four times in a row every 2 seconds). If this happens, turn "o" the main power of the ERV and
restart the unit. If the unit still does not turn on, call a service technician.
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