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21
8. 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 the unit, inspect the damper system, remove any undesirable
obstacle or dirt (filters and core may have to be removed to access the
damper system). Plug the unit.
If STEP 1 did not fix the problem, perform STEP 2: Open electrical
compartment, check if connector J5 (white) is well inserted, check for any loose
wires.
If STEP 2 did not fix the problem, perform STEP 3: If the damper is not moving
at all, unplug J7 (red) from the electronic assembly, connect the white damper
system connector into J7. If the damper moves (but the system still shows an
error), the electronic assembly must be replaced. Otherwise, replace the damper
system.
E02 Supply damper timeout
E03 Supply damper
E05 Exhaust damper range STEP 1: Unplug the unit, inspect the damper system, remove any undesirable
obstacle or dirt (filters and core may have to be removed to access the
damper system). Plug the unit.
If STEP 1 did not fix the problem, perform STEP 2: Open electrical
compartment, check if connector J7 (red) is well inserted, check for any loose
wires.
If STEP 2 did not fix the problem, perform STEP 3: If the damper is not moving at
all, unplug J5 (white) from the electronic assembly, connect the white damper
system connector into J5. If the damper moves (but the system still shows an
error), the electronic assembly must be replaced. Otherwise, replace the damper
system.
E06 Exhaust damper timeout
E07 Exhaust damper
E09 Recirculation damper range STEP 1: Unplug the unit, inspect the damper system, remove any undesirable
obstacle or dirt (filters and core may have to be removed to access the
damper system). Plug the unit.
If STEP 1 did not fix the problem, perform STEP 2: Open electrical
compartment, check if connector J6 (blue) is well inserted, check for any loose
wires.
If STEP 2 did not fix the problem, perform STEP 3: If the damper is not moving at
all, unplug J5 (white) from the electronic assembly, connect the blue damper
system connector into J5. If the damper moves (but the system still shows an
error), the electronic assembly must be replaced. Otherwise, replace the damper
system.
E10 Recirculation damper timeout
E11 Recirculation damper
E22 Supply airflow STEP 1: Unplug the unit. Perform a visual inspection of the supply damper
system. Clean filters, distribution registers and outside supply hood. Inspect
ducting to ensure it is not squeezed or bent. Plug the unit.
If STEP 1 did not fix the problem, perform STEP 2: Remove ducting of the supply
path. On the LCD screen, select MAX to check if the unit is able to reach the
selected flow. If so, review the ducting path.
If STEP 2 did not fix the problem, perform STEP 3: On the LCD screen, select the
MIN and MAX flow setting values then reset the unit. MAX flow value will display
on the LCD screen. If MAX flow is above desired MAX flow, set MAX and MIN
flows.
If STEP 3 did not fix the problem, perform STEP 4: Replace the supply blower
and repeat STEP 3.
If STEP 4 did not fix the problem, perform STEP 5: Replace the electronic assembly.
E23 Supply motor (drive over current) STEP 1: Unplug/plug the unit.
If STEP 1 did not fix the problem, perform STEP 2: Remove core and clear the
ventilation wheel from any dirt or obstacles.
If STEP 2 did not fix the problem, perform STEP 3: Disconnect J2 (white) and
connect a spare blower system. If it works, replace supply blower.
If STEP 3 did not fix the problem, perform STEP 4: Replace the electronic assembly.
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 the unit. Under and over voltage may be detected with
severe in-house power supply fluctuation and stop the motor for protection.
If STEP 1 did not fix the problem, perform STEP 2: Replace the electronic assembly.
E25 Supply motor (drive under voltage)
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