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ERV & HRV: User and Installer Manual

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

INSTALLER’S TROUBLESHOOTING

WARNING

PERSONAL INJURY HAZARD

Failure to follow this warning could result in personal injury, death, or

equipment damage.

A few diagnosis procedures may require the unit to be in operation

while proceeding. Be careful with moving and/or live parts.

ERROR

DESCRIPTION

SOLUTION

E01

Supply damper range

STEP 1: Unplug 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 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 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 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 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 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: 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.

E23

Supply motor (drive

over current)

STEP 1: Unplug/plug 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