175619-XIM-C-0109
Johnson Controls Unitary Products
37
FAN ON AND OFF DELAYS
The fan on and off delays can be field adjusted by
pressing a combination of buttons on the UCB.
•
Electric Heat
- Press and release the
COMM
SETUP
and
LAST ERROR
buttons at the same
time. The control flashes twice on the LED as
the control writes a 0 second ON and a 30
second OFF fan delay to the control’s pro-
gram memory.
MAINTENANCE
NORMAL MAINTENANCE
FILTERS
Inspect once a month. Replace disposable or clean
permanent type as necessary. DO NOT replace per-
manent type with disposable. The dimensional size of
the replacement filter must be the same as the
replaced filter.
MOTORS
Outdoor fan motors are permanently lubricated and
require no maintenance.
Indoor Blower Motor and Drive - The indoor blower
motor features ball bearings that do not require
periodic lubrication. Periodic lubrication of the motor
and bearings can extend the life of components but is
optional.
TABLE 8:
UNIT CONTROL BOARD FLASH
CODES
Flash Code
Description
On Steady
Control Failure - Replace Control
Heart Beat
Normal Operation
1 Flash
Not Applicable
2 Flashes
Control waiting ASCD
1
1.
These flash codes do not represent alarms.
3 Flashes
HPS1 - Compressor Lock out
5 Flashes
LPS1 - Compressor Lock out
7 Flashes
FS1 - Compressor Lock out
10 Flashes
Compressors Locked Out On Low
Outdoor Air Temperature
1
11 Flashes
Compressors Locked Out Because The
Economizer Is Using Free Cooling
1
13 Flashes
Compressor Held Off Due To Low Voltage
1
14 Flashes
EEPROM Storage Failure (Control Failure)
OFF
No Power or Control Failure
Prior to any of the following maintenance pro-
cedures, shut off all electric power to the unit to
prevent personal injury.
Damage can occur if the bearings are overlu-
bricated. Use grease sparingly.
Perform all maintenance operations on the
blower motor with electric power disconnected
from the unit. Do not attempt to lubricate bear-
ings with the unit in operation.