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4. C
ONTROLS
4.1 I
C
NTEGRATED
ONTROL
These units are equipped with an integrated control located under the electrical compartment of the
unit. Use the push button (1) to control the unit; the LED (2) will then show which mode the unit is in
(see illustration at right).
Refer to table below to see how to operate the unit using its integrated control.
P
RESS ON PUSH BUTTON
O
NCE
T
WICE
T
HREE TIMES
If a problem occurs during the unit operation, its integrated control LED (2) will blink. The color of the blinking light depends on the
type of error detected. Refer to Section 9 Troubleshooting on last pages for further details.
NOTE: The integrated control must be turned OFF to use an optional main control.
4.2 B
S
OOTING
EQUENCE
The unit booting sequence is similar to a personal computer boot sequence. Each time the unit is plugged after being unplugged, or
after a power failure, the unit will perform a 30-second booting sequence before starting to operate.
During the booting sequence, the integrated defrost control LED will light AMBER for 5 seconds, and then will shut off for 2 seconds.
After that, the LED will light RED for the rest of the booting sequence. During this RED light phase, the unit is checking and resetting
the motorized damper position. Once the motorized damper position completely set, the RED light turns off and the booting sequence
is done.
4.3 S
E
ETTING
XTENDED
The unit is factory set to normal defrost. In cold region (outdoor temperature -17°F and lower), it may be
necessary to setup extended defrost. During the first 3 seconds of booting sequence, while the integrated
control LED is AMBER, press on push button for about 3 seconds. The LED will blink GREEN the number of times
corresponding to the actual defrost mode of the unit.
NOTE: During setting extended defrost, while the push button is pressed, the LED will light RED to indicate
the signal has been received.
Refer to table below to modify the defrost cycle of the unit. It is possible to change the selection as many times
needed.
To exit setting extended defrost, press 3 seconds on push button OR wait 60 seconds; the LED will blink and shut off, then light RED
(the unit returns in its booting sequence).
LED C
OLOR
AMBER
GREEN
N
O LIGHT
D
EFROST
D
C
EFROST
YCLE
1
(HRV
)
NORMAL
UNIT
2
(HRV
)
EXTENDED
UNIT
3
(ERV
)
NORMAL
UNIT
4
(ERV
)
EXTENDED
UNIT
R
ESULTS
U
L
NIT IS ON
OW
U
H
NIT IS ON
IGH
U
O
NIT IS
P
RESS ON PUSH BUTTON
O
NCE
T
WICE
T
HREE TIMES
F
OUR TIMES
12
VD0310
S
PEED
S
PEED
FF
LED
GREEN
BLINKS
1
TIME
2
TIMES
3
TIMES
4
TIMES
1
2
VD0324
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