TrueFRESH Installation Manual

Troubleshooting (continued)
Problem Possible Cause or
Symptom
Test Procedure Solution
• Exhaust Fan
activated
Supply Fan off.
• Wiring of fans
incorrect on HVC
Controller
• Unit is in its
automatic defrost
sequence when
defrost thermister
measures
temperature of
-5ºC/23ºF
• Unplug unit, remove access
panel from Exhaust Fan (right
motor mount) . Ensure all
connections on HVC & LVC
board correspond to wiring
diagram and that they are
securely in place.
• Wait 5 to 10 minutes to ensure
unit has completed the defrost
sequence.
• Ensure wiring
corresponds to wiring
diagram.
• Test the defrost
thermister with Ohm
meter.
• Insure unit completes
the defrost sequence is
temperature are below -
5°C/23°F.
• T-3 Timers not
functioning, the
LED remains
on with a dim
green light.
• T-3 Timers not
functioning,
display LED
light doesn’t
appear.
• T-3 timer wires
connections do not
correspond to the
Speed Control™. (G
& B connections are
inverted)
• HRV/ERV does not
operate or respond.
• Disconnect all wall controls
from unit.
• Override TIMER (R & G)
connections of the Speed
Control™.
• Ensure all wall controls
wire connection
correspond to the Speed
Control™ connections.
(Example:B►B/G►G/R►R
) (Ref: Wall Control Section
of the Installation Guide.)
Air is too dry Air is too dry 1. Increase humidity level
on the dehumidistat.
2. Switch ventilation mode
from continuous to
intermittent.
3. Install a humidifier.
Air is too humid Air is too humid 1. Reduce the humidity
level on the controller.
2. Make sure that the
clothes dryer is vented
to the outdoors.
3. Wait for outside
temperature to change.
For example, it can be
very humid at times in
the summer.
4. Verify balancing of the
ERV/HRV unit (see
Balancing Steps on
page 30).
TrueFRESH™ ERV/HRV Ventilation Systems 69-2480EF—17
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