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18
7. INSTALLER’S TROUBLESHOOTING
The wearing of safety glasses and gloves is recommended since a few diagnosis procedures may require the
unit to be in operation while proceeding. Be careful with moving and live parts to prevent any risk of injury.
WARNING
!
ERROR DESCRIPTION SOLUTION
E01
Supply damper range
STEP 1: Unplug unit, inspect the damper system, remove any undesirable
obstacle or dirt (fi lters and core may have to be removed to access the
damper system). Plug unit.
If STEP 1 did not fi x the problem, contact customer service.
E02
Supply damper timeout
E03
Supply damper
E05
Exhaust damper range
E06
Exhaust damper timeout
E07
Exhaust damper
E09
Recirculation damper range
E10
Recirculation damper timeout
E11
Recirculation damper
E22
Supply (fresh) airfl ow
STEP 1: Unplug the unit. Perform a visual inspection of the supply damper
system. Clean fi lters, distribution registers and outside supply hood. Inspect
ducting to ensure it is not squeezed or bent. Plug the unit.
If STEP 1 did not fi x the problem, perform STEP 2: Unplug unit and remove
ducting of the supply path. Replug the unit. On the wall control, select MAX
to check if the error code disappeared. If so, review the ducting path.
If STEP 2 did not fi x the problem, contact customer service.
E23
Supply motor (drive over current)
STEP 1: Unplug/plug unit.
If STEP 1 did not fi x the problem, perform STEP 2: Unplug the unit. Remove
core and clear the ventilation wheel from any dirt or obstacles. Place back
the core, close the door and plug the unit.
If STEP 2 did not fi x the problem, contact customer service.
E27
Supply motor (drive foc duration)
E28
Supply motor (drive speed feedback)
E29
Supply motor (startup)
E24
Supply motor (drive over voltage)
STEP 1: Unplug/plug unit. Under and over voltage may be detected with
severe in-house power supply fl uctuation and stop the motor for protection.
If STEP 1 did not fi x the problem, contact customer service.
E25
Supply motor (drive under voltage)
E26
Supply motor (drive over temp)
STEP 1: Validate if the air exchanger is exposed to ambient temperatures
within the operating limits (see section 2.3)
If STEP 1 did not fi x the problem, contact customer service.
E32
Exhaust (stale) airfl ow
STEP 1: Unplug the unit. Perform a visual inspection of the exhaust damper
system. Clean fi lters, distribution registers and outside supply hood. Inspect
ducting to ensure it is not squeezed or bent. Plug the unit.
If STEP 1 did not fi x the problem, perform STEP 2: Unplug unit and remove
ducting of the supply path. Replug the unit. On the wall control, select MAX
to check if the error code disappeared. If so, review the ducting path.
If STEP 2 did not fi x the problem, contact customer service.
E33
Exhaust motor (drive over current)
STEP 1: Unplug/plug unit.
If STEP 1 did not fi x the problem, perform STEP 2: Unplug the unit. Remove
core and clear the ventilation wheel from any dirt or obstacles. Place back
the core, close the door and plug the unit.
If STEP 2 did not fi x the problem, contact customer service.
E37
Exhaust motor (drive foc duration)
E38
Exhaust motor (drive speed
feedback)
E39
Exhaust motor (startup)
E34
Exhaust motor (drive over voltage)
STEP 1: Unplug/plug unit. Under and over voltage may be detected with
severe in-house power supply fl uctuation and stop the motor for protection.
If STEP 1 did not fi x the problem, contact customer service.
E35
Exhaust motor (drive under voltage)
E36
Exhaust motor (drive over temp)
STEP 1: Validate if the air exchanger is exposed to ambiant temperatures
within the operating limits (see section 2.3)
If STEP 1 did not fi x the problem, contact customer service.
When the unit detects an error, the corresponding error code displays on the LCD screen.
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