Venmar A160H65RT - Page 21

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error deSCription Solution
E26
Supply motor (drive over temp)
STEP 1: Validate if the air exchanger is exposed to ambient temperatures
within the operating limits (see p. 4)
If STEP 1 did not x the problem, perform STEP 2: Replace the electronic
assembly.
E32
Exhaust airow
STEP 1: Perform a visual inspection of the exhaust damper system. Clean
lters, distribution registers and outside supply hood. Inspect ducting to
ensure it is not squeezed or bent.
If STEP 1 did not 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 ow. If so, review the ducting path.
If STEP 2 did not x the problem, perform STEP 3: On the LCD screen, select
the MIN and MAX ow setting values then reset the unit. MAX ow value will
display on the LCD screen. If MAX ow is above desired MAX ow, set MAX
and MIN ows.
If STEP 3 did not x the problem, perform STEP 4: Replace the exhaust
blower and repeat STEP 3.
If STEP 4 did not x the problem, perform STEP 5: Replace the electronic
assembly.
E33
Exhaust motor (drive over current)
STEP 1: Unplug/plug unit.
If STEP 1 did not x the problem, perform STEP 2: Remove core and clear the
ventilation wheel from any dirt or obstacles.
If STEP 2 did not 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 x the problem, perform STEP 4: Replace the electronic
assembly.
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 uctuation and stop the motor for protection.
If STEP 1 did not x the problem, perform STEP 2: Replace the electronic
assembly.
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 p. 4)
If STEP 1 did not x the problem, perform STEP 2: Replace the electronic
assembly.
E40
Outside air thermistor
STEP 1: Check if thermistor is well connected in connector J7A.
If STEP 1 did not 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 x the problem, perform STEP 3: Replace the electronic
assembly.
E41
Distribution air thermistor
STEP 1: Check if thermistor is well connected in connector J7B.
If STEP 1 did not 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 x the problem, perform STEP 3: Replace the electronic
assembly.
E42
PCBA thermistor fault
STEP 1: Replace the electronic assembly.
E43
PCBA temperature over limit
STEP 1: Validate if the air exchanger is exposed to ambiant temperatures
within the operating limits (see p. 4)
If STEP 1 did not x the problem, perform STEP 2: Replace the electronic
assembly.
E50
Wall control communication lost
STEP 1: Unplug unit, inspect wires, plug unit.
If STEP 1 did not 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 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 x the problem, perform STEP 4: Replace the electronic
assembly.
E51
Wall control sensor
STEP 1: Unplug unit, inspect wires, plug unit.
If STEP 1 did not x the problem, perform STEP 2: Replace the wall control.
E60
Protection mode
STEP 1: Perform general inspection of the unit (dampers, core, lters).
8. INSTALLER’S TROUBLESHOOTING (Cont’d)