Rev 2.3 July 17, 2017
16
7
Control Board Status LEDs
The control board is equipped with LEDs which indicate the unit’s current state of operation.
8
Selectable Furnace/Air Handler Interlock
You may choose on the unit control board to interlock whenever the HRV/ERV is operating at
any speed, or just high speed. Position 5: interlock at any HRV speed; Position 6: interlock at
HRV high speed only.
CONDITION
LED AND STATUS
NO LED
UNIT/TRANSFORMER IS NOT POWERED
UNIT OFF
Red is off, Green is blinking slow, every 1 s. Also indicates processor is
programmed and running.
STANDBY
Green is OFF. Red led is blinking slow, every 1 s.
EXHCHANGE LOW SPEED
Green ON. Red blinking slow, every 1 s.
EXCHANGE HIGH SPEED
Green ON. Red blinking fast.
DEFROST
Green ON, Red ON. (Appears Yellow)
RECIRCULATION LOW SPEED*
Red led ON, Yellow blinking slow, every 1s.
RECIRCULATION HIGH SPEED*
Red led ON, Green led blinking fast.
One jumper must be present in
jumper range 1-4 and in jumper
range 5-8.
Do not alter jumper set 3.
1 2 3 4 5 6 7 8
(factory setting shown)
Summary of Contents for NU0103
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