5300477-UIM-A-0317
Johnson Controls Unitary Products
13
STARTUP
1.
Check the electrical supply voltage being supplied. Be sure that it is
within the specified range on the unit data plate.
2.
Make sure all electrical connections are tight.
3.
Turn unit electrical power on.
4.
Set the room thermostat to COOL mode, and lower the desired
temperature setting lower than the room temperature to create a
call for cooling.
5.
Check compressor rotation. If the scroll is misshaped, change the
incoming line connection phasing to obtain the proper rotation.
6.
Measure the total system duct static, and set the blower motor cool-
ing speed appropriately per airflow performance tables.
7.
If an optional electric heat kit is installed, make sure the heat blower
speed is set at or above the required speed. See Table 13.
8.
Make sure all unit panels are in place and secured, and that an air
filter is installed.
FIGURE 8:
Indoor Blower Control
$03&21752/)86(
',$*1267,&/('
02'(/
,'3/8*
-803(5
$
$&+36(/(&7,21
'(+80,',67$76(/(&7,21
,1'225$,5)/2:6(/(&7,21
Table 14:
Enhanced ECM Indoor Blower Control Board Fault Codes
Flashes
Fault Condition
LED OFF
No power to control
LED ON
Internal control failure
SLOW RED
Control normal operation
RAPID RED
Factory
Test Mode
7 RED
Call for heat and cool at the same time
8 RED
Model ID plug not inserted
9 RED
Internal fault self corrected, attempting normal operation
CAUTION
Scroll compressors require proper rotation to operate properly. Fail-
ure to check and correct rotation may result in property damage.
!
NOTICE
Three-phase, scroll compressors operate in only one direction. If the
scroll is drawing low amperage, has similar suction and discharge
pressures, or is producing a high noise level, the scroll is misshaped.
