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4. CONTROLS
4.1 I
C
NTEGRATED
ONTROL
All units are equipped with an integrated control, located in front of the electrical compartment. Use the
push button (1) to control the unit. The LED (2) will then show what mode the unit is in.
NOTES: 1. The integrated control must be turned OFF to use an optional main control.
2. If an optional auxiliary control is used, when activated, it overrides the optional main control.
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
T
HREE
IMES
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 pages 19 and 20 for further details.
4.1.1 B
S
OOT
EQUENCE
The unit boot 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 control LED will light GREEN (unit set in normal defrost) or AMBER (unit set in extended defrost) 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.
NOTE: No command will be taken until the unit is fully booted.
4.1.2 S
E
D
ETTING
XTENDED
The unit is factory set to normal defrost. In cold areas, it may be necessary to setup extended defrost. During
the first 5 seconds of booting sequence, while the integrated control LED is GREEN, press on push-button until
the LED turns AMBER (about 3 seconds).
When installed in reverse postion (upside down) in a cold region where outside temperature could drop below
-20oC (-4oF) for more than 5 days in a row, the unit must always be set in extended defrost.
LED C
OLOR
A
MBER
G
REEN
N
L
O
IGHT
EFROST
R
ESULTS
U
L
S
NIT IS ON
OW
PEED
U
H
S
NIT IS ON
IGH
PEED
U
OFF
NIT IS
CAUTION
13
2
1
VD0278
VD0281
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