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TEST MODE PROCEDURE
Operating the unit from the roof using the test mode.
unit in the test mode, the evaporator access panel and the
control box cover, must be closed. Failure to ensure that
the evaporator access panel and control box cover is in
place could result in severe personal injury or death.
The Unitary Control Processor (UCP) has a red indicator light
in the lower left corner. When power is applied to the unit the
light will glow if the UCP is functioning correctly. If the system
is placed in the test mode the light will blink continuously.
Note: The control box cover has a small peep hole, located in
the lower left hand corner. The red indicator light on the UCP
can be seen through this peep hole. Do not remove the control
box cover while the unit power is connected.
Step Test Mode
— The step test mode is initiated by shorting across the
"TEST" terminals, marked test 1 and test 2 on the unit's
low voltage terminal strip (LTB), for two (2) to three (3)
seconds and then removing the short.
— When the test mode is initiated, the light on the UCP will
blink and the system will begin the first test step, and turn
on the indoor fan. (See test mode table)
— To continue to the next step, reapply the short across the
test terminals for 2 to 3 seconds.
— The unit may be left in any test step for up to one hour. If
allowed to remain in any test step for more than one hour,
the test mode will terminate and control will revert to the
zone sensor. As you continue to apply and remove the
short across the test terminals, the unit will move through
the steps according to the table below.
— To terminate the test mode, cycle the unit power at the unit
disconnect or continue stepping through the modes until
the UCP's indicator light glows constantly.
When operating the
Auto Test Mode
— The auto test mode is initiated by installing a jumper
between terminals marked TEST 1 and TEST 2 on the
LTB. The unit will start in step 1 and cycle through the test
steps one time, changing every 30 seconds.
— When the test mode is initiated, the light on the UCP will
blink and the system will begin the first test step, and turn
on the indoor fan. (See test mode table)
— At the end of the auto test mode, the indicator light will
glow constantly and control will revert to the zone sensor.
— The unit can be left in any one of the test steps, by
removing the jumper. It will remain in this step for up to one
hour. If allowed to remain in any test step for more than
one hour, the test mode will terminate and control will
revert to the zone sensor.
— To terminate the test mode, cycle the unit power at the unit
disconnect.
Resistance Test Mode
— The resistance test mode is initiated by applying the
appropriate resistance value across the "Test" terminals
marked TEST 1 and TEST 2 on the LTB.
— When the test mode is initiated, the light on the UCP will
blink and the system will begin the test step selected by the
resistance being applied across the test terminals. (See
test mode table)
— The resistance values are indicated in the Resistance
Value Chart.
— After selecting the desired test step, and applying the
appropriate resistance across the test terminals, the unit
will start.
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