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23
WARNING DESCRIPTION SOLUTION
W22 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.
W32 Exhaust airflow STEP 1: Unplug the unit. Perform a visual inspection of the exhaust damper system. Clean filters,
distribution registers and outside exhaust hood. Make sure no non-return damper is installed in
exhaust hood since it can freeze in winter. 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 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 section 5 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 set in high speed and located in a warmer
environment, for example over 30°C (86°F).
8. INSTALLER’S TROUBLESHOOTING (CONT’D)
CAUTION
Make sure that no piece of mineral wool will enter in the unit during installation. Otherwise, this could reduce airflow and generate
vibrations and noise in the unit.
NOTE: 210 and 230 CFM models have a cooling fan in electrical box that can start if ambient temperature near the unit is over 104°F.
8.1 ELECTRONIC PROTECTION TO PREVENT ABNORMAL HIGH STATIC PRESSURE
180 CFM ERV Models
The unit will reduce airflow by 30 CFM if the max airflow during auto-balancing procedure is 130 CFM or less to prevent ERV core
membrane deformation due to very high static pressure (over 1.3 in. w.g.).
All 180 CFM Models
Error E22 or E32 will display if the maximum airflow is 90 CFM or less during the auto-balancing procedure (the unit will attempt to
execute auto-balancing procedure 3 times before displaying an error). Static pressure of ducting shall be reduced to allow good
operation of the unit.
210 CFM ERV Models
The unit will reduce airflow by 30 CFM if the max airflow during auto-balancing procedure is 160 CFM or less to prevent ERV core
membrane deformation due to very high static pressure (over 1.3 in. w.g.).
All 210 and 230 CFM Models
Error E22 or E32 will display if the maximum airflow is 120 CFM or less during the auto-balancing procedure (the unit will attempt
to execute auto-balancing procedure 3 times before displaying an error). Static pressure of ducting shall be reduced to allow good
operation of the unit.
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