vanEE AI Series User's And Installer's Manual page 21

8. INSTALLER'S TROUBLESHOOTING (
E D
RROR ESCRIPTION
E26 Supply motor (drive over temp)
E32 Exhaust airfl ow
E33 Exhaust motor (drive over current)
E37 Exhaust motor (drive foc duration)
E38 Exhaust motor (drive speed
feedback)
E39 Exhaust motor (startup)
E34 Exhaust motor (drive over voltage)
E35 Exhaust motor (drive under voltage)
E36 Exhaust motor (drive over temp)
E40 Outside air thermistor
E41 Distribution air thermistor
E42 PCBA thermistor fault
E43 PCBA temperature over limit
E50 Wall control communication lost
E51 Wall control sensor
E60 Protection mode
' )
CONT D
STEP 1: Validate if the air exchanger is exposed to ambient temperatures
within the operating limits (see p. 4)
If STEP 1 did not fi x the problem, perform STEP 2: Replace the electronic
assembly.
STEP 1: Unplug the unit. Perform a visual inspection of the exhaust damper
system. Clean fi lters, 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 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 fl ow. If so, review the ducting path.
If STEP 2 did not fi x the problem, perform STEP 3: On the LCD screen, select
the MIN and MAX fl ow setting values then reset the unit. MAX fl ow value will
display on the LCD screen. If MAX fl ow is above desired MAX fl ow, set MAX
and MIN fl ows.
If STEP 3 did not fi x the problem, perform STEP 4: Replace the exhaust
blower and repeat STEP 3.
If STEP 4 did not fi x the problem, perform STEP 5: Replace the electronic
assembly.
STEP 1: Unplug/plug unit.
If STEP 1 did not fi x the problem, perform STEP 2: Remove core and clear the
ventilation wheel from any dirt or obstacles.
If STEP 2 did not fi x the problem, perform STEP 3: Disconnect J3 (red) and
connect a spare blower system. If it works, replace exhaust blower.
If STEP 3 did not fi x the problem, perform STEP 4: Replace the electronic
assembly.
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, perform STEP 2: Replace the electronic
assembly.
STEP 1: Validate if the air exchanger is exposed to ambiant temperatures
within the operating limits (see p. 4)
If STEP 1 did not fi x the problem, perform STEP 2: Replace the electronic
assembly.
STEP 1: Check if thermistor is well connected in connector J7A.
If STEP 1 did not fi x the problem, perform STEP 2: Disconnect connector J7A
and check if the measured resistance (thermistor connector) is within
5 Kohms to 120 Kohms. If outside the range, replace the thermistor.
If STEP 2 did not fi x the problem, perform STEP 3: Replace the electronic
assembly.
STEP 1: Check if thermistor is well connected in connector J7B.
If STEP 1 did not fi x the problem, perform STEP 2: Disconnect connector J7B
and check if the measured resistance (thermistor connector) is within
5 Kohms to 120 Kohms. If outside the range, replace the thermistor.
If STEP 2 did not fi x the problem, perform STEP 3: Replace the electronic
assembly.
STEP 1: Replace the electronic assembly.
STEP 1: Validate if the air exchanger is exposed to ambiant temperatures
within the operating limits (see p. 4)
If STEP 1 did not fi x the problem, perform STEP 2: Replace the electronic assembly.
STEP 1: Unplug unit, inspect wires, plug unit.
If STEP 1 did not fi x the problem, perform STEP 2: Remove wall control from
the wall installation and test with a short cable. If it works, bring a new cable
to the wall installation location.
If STEP 2 did not fi x the problem, perform STEP 3: Test the air exchanger with
a spare wall control. If it works, replace the wall control.
If STEP 3 did not fi x the problem, perform STEP 4: Replace the electronic
assembly.
STEP 1: Unplug unit, inspect wires, plug unit.
If STEP 1 did not fi x the problem, perform STEP 2: Replace the wall control.
STEP 1: Perform general inspection of the unit (dampers, core, fi lters).
21
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OLUTION