22
9. TROUBLESHOOTING
If the unit does not work properly, reset the unit by unplugging it for one minute and then replug it. If it still not working properly,
refer to table below.
If the LED of the unit is flashing, this means the unit sensors have detected a problem. See the table below to know where the problem
occurs on the unit.
LED
SIGNAL
E
RROR
TYPE
A
CTION
U
NIT
STATUS
LED flashes GREEN
(double blink every
2 seconds).
Outdoor thermistor error.
• Ensure J12 connector is properly connected
and its wires are not damaged. If they are
correct:
•
For ERV100SP unit
: replace the damper
assembly.
•
For ERV100S unit:
replace the fresh air from
outdoor thermistor.
Unit works but will defrost
frequently.
LED flashes GREEN
(2 blinks per second;
faster blink).
Building side thermistor error.
• Ensure J20 connector is properly connected
and its wires are not damaged. If they are
correct:
• Replace the thermistor in the warm side blower.
Unit does not work.
LED flashes AMBER
(ERV100SP
unit only).
Damper system error.
• Go to point 7 in next table.
Unit does not work.
LED flashes RED
(one blink every
2 seconds).
Cold side motor error, open
door or magnetic switch bad
contact.
For ERV100SP unit
:
• Check if the unit door is properly closed, then
push once on integrated push button to restart
unit.
• Check for the door magnet to be properly
seated onto the door. If not, correct the
situation, close the door and push once on the
integrated push button to restart unit.
• Ensure J11 connector is properly connected
and its wires are not damaged. If not, correct the
situation, close the door and push once on the
integrated push button to restart unit.
For all units
:
• Using a flat blade screwdriver, jump J11 while
pushing once on push button at the same time.
If the LED is still flashing, go to point 8 in next
table for motor diagnosis.
Unit does not work.
LED flashes RED
(2 blinks per second;
faster blink).
Unit is on protection mode
or is in error because it has
been in protection mode for
an abnormal time.
• If outdoor temperature is colder than -13°F, it
could be normal for the unit to enter in
protection mode.
• To see if the unit is in error, wait 5 minutes,
unplug the unit, wait 1 minute and plug it back.
Wait for the booting sequence to be done, then
see if it still shows this error. If yes, press and
hold the push button during 7 seconds to reset
this error. Another LED signal can happen;
refer to the appropriate LED color code and
blinks. If no, go to point 9 in next table.
Unit exhaust air without
entering fresh air for
a 2-hour period, then
resume to its previous
operation mode and stops
flashing RED. If LED
continues to flash RED
when back to previous
mode, the unit is in error.
Go to point 9 in next table.