ERV & HRV: User and Installer Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
16
INSTALLER’S TROUBLESHOOTING (CONT’D)
WARNING
DESCRIPTION
SOLUTION
W22
Supply airflow
STEP 1: 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. 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.
W32
Exhaust airflow
STEP 1: Perform a visual inspection of the exhaust damper system. Clean filters, distribution registers and
outside supply hood. Inspect ducting to ensure it is not squeezed or bent. If STEP 1 did not fi x 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 exhaust blower and repeat STEP 3.
If STEP 4 did not fix the problem, perform STEP 5: Replace the electronic assembly.
W52
Initial setting
incomplete
STEP 1: Press + or - to access the selection menu.
STEP 2: Complete configuration. (Refer to
(AUTO-BALANCING PROCEDURE on p11)
for more details).
W61
Protection mode
electronics
overheating
The unit is currently in protection mode. The power transmitted to the motor is deliberately reduced to
decrease electronics temperature. The unit will exit this mode by itself once conditions are back to normal. It is
normal to observe reduction in airflows during this period.
This condition should appear only when the unit is located in a warm environment, for example over 60°C
(140°F). If this condition appears while the unit is located in an environment where the ambient temperature is
under 30°C (86°F), replace the electronic assembly.
