17
7. T
ROUBLESHOOTING
If the unit does not work properly, reset the unit by unplugging it for one minute and then replug it. If it is still not working
properly, refer to table below.
If the integrated control LED of the unit is flashing, this means the unit sensors detected a problem. See the table below to know where
the problem occurs on the unit.
LED
COLOR
E
RROR
TYPE
A
CTION
U
NIT
STATUS
LED flashes GREEN
Thermistor error
Replace thermistor
Unit works but will defrost frequently
LED flashes AMBER
Damper error
Go to point 3
Unit does not work
P
ROBLEMS
P
OSSIBLE
CAUSES
Y
OU
SOULD
TRY
THIS
1
The error code E1 is
displayed on main wall
control screen.
• The wires may be in reverse position.
• The wires may be broken.
• The wires may have a bad
connection.
• Ensure that the color coded wires have been connected to
their appropriate places.
• Inspect every wire and replace any that are damaged.
• Ensure the wires are correctly connected.
2
Unit does not work.
• The circuit board may be defective.
• The fuse may be defective.
3
The damper actuator
does not work.
•
The damper actuator or the
integrated damper mechanism may
be defective.
• The circuit board or the transformer
may be defective.
• Unplug the unit. Disconnect the main control and the optional
controls(s) (if need be). Wait 10 seconds and plug the unit
back. Check if the damper opens. If not, use a multimeter
and check for 24 VAC on J12-1 and J12-2 (in electrical
compartment). If there is 24 VAC, replace the entire damper
assembly.
NOTE: It is normal to experience a small delay (7-8 seconds)
before detecting the 24 VAC signal at starting-up.
This signal will stay during 17-18 seconds before
disappearing.
• If there is no 24 VAC, check for 24 VAC between J8-1 and
J8-2. If there is 24 VAC, replace the circuit board, and if
there is no 24 VAC, change the transformer.
4
The wall control does not
work.
• The wires may be in reverse position.
• The wires may be broken.
• The wire in the wall OR the wall
control may be defective.
• Ensure that the color coded wires have been connected to
their appropriate places.
• Inspect every wire and replace any that are damaged.
• Remove the wall control and test it right beside the unit
using another shorter wire. If the wall control works there,
change the wire. If it does not, change the wall control.
5
The 20-minute lighted
push button timer does
not work OR its indicator
light does not stay on.
• The wires may be in reverse postion.
• The 20-minute lighted push button
may be defective.
• Unplug the unit. Disconnect
the main control and the
optional(s) control(s) (if need
be). Jump
G
and
B
terminals.
Plug the unit back and wait about 10 seconds. If the motors
run on high speed and the damper opens, the circuit board
is not defective.
• Check if fuse F1 is blown. In that case, replace fuse F1 as
per product nameplate.
NO C NC I OC OL Y R G B
VE0097
• Ensure that the color coded wires have been connected to
their appropriate places.
•
Jump the OL and OC
terminals. If the unit switch to
high speed, remove the push
button and test it right beside
the unit using another shorter wire. If it works here, change
the wire. If it doesn’t, change the push button.
NO C NC I OC OL Y R G B
VE0098
