Johnson Controls SA PD 180 THRU 240 - Manual (Page 23)

430645-YIM-D-0610
Johnson Controls Unitary Products 23
Flash Codes
Various flash codes are utilized by the unit control board (UCB)
to aid in troubleshooting. Flash codes are distinguished by the
short on and off cycle used (approximately 200ms on and
200ms off). To show normal operation, the control board
flashes a 1 second on, 1 second off "heartbeat" during normal
operation. This is to verify that the UCB is functioning correctly.
Do not confuse this with an error flash code. To prevent
confusion, a 1-flash, flash code is not used.
Alarm condition codes are flashed on the UCB lower left Red
LED, See Figure Table 11. While the alarm code is being
flashed, it will also be shown by the other LEDs: lit continuously
while the alarm is being flashed. The total of the continuously lit
LEDs equates to the number of flashes, and is shown in the
table. Pressing and releasing the LAST ERROR button on the
UCB can check the alarm history. The UCB will cycle through
the last five (5) alarms, most recent to oldest, separating each
alarm flash code by approximately 2 seconds. In all cases, a
flashing Green LED will be used to indicate non-alarm
condition.
In some cases, it may be necessary to "zero" the ASCD for the
compressors in order to perform troubleshooting. To reset all
ASCDs for one cycle, press and release the UCB TEST/
RESET button once.
Flash codes that do and do not represent alarms are listed in
Table Table 10.
Unit Control Board Option Setup
Option Byte Setup
• Enter The Option Setup Mode By Pushing The Option
Setup / Store Button, And Holding It For At Least 2
Seconds.
• The Green Status Led (Option Byte) Will Be Turned On
And The Red Status Led (Heat Delay) Is Turned Off.
• The 4 Led Will Then Show The Status Of The Labeled
Option Low Ambient Lockout.
• Press The Up Or Down Button To Change The Led Status
To Correspond To The Desired Option Setup.
• To Save The Current Displayed Value, Push The Option
Setup / Store Button And Hold It For At Least 2 Seconds.
When The Value Is Saved, The Green Led Will Flash A
Few Times And Then Normal Display Will Resume.
NOTE: While in either Setup mode, if no buttons are pushed for
60 seconds, the display will revert to its normal display,
exiting the Option Setup mode. When saving, the
control board only saves the parameters for the
currently displayed mode (Option Byte or Heat
Delay). (Heat Delay not applicable on these units.)
Normal Maintenance
Periodic maintenance consists of changing or cleaning filters
and general cleaning of the outdoor coil.
FILTERS - Inspect once a month. Replace Disposable or clean
Permanent Type as necessary. DO NOT replace Permanent
Type with Disposable.
MOTORS - Outdoor fan motors are permanently lubricated and
require no maintenance.
OUTDOOR COIL - Dirt should not be allowed to accumulate on
the outdoor coil surface or other parts in the air circuit. Cleaning
should be as often as necessary to keep the coil clean. Use a
brush, vacuum cleaner attachment, or other suitable means. Be
sure that the power to the unit is shut off prior to cleaning.
Troubleshooting
Prior to any of the following maintenance procedures,
shut off all power to the unit, to avoid personal injury.
Exercise care when cleaning the coil so that the coil fins
are not damaged.
Do not permit the hot condenser air discharge to be
obstructed by overhanging structures or shrubs.
Troubleshooting of components necessarily requires
opening the electrical control box with the power
connected to the unit. Use extreme care when working
with live circuit! Check the unit nameplate for the correct
range before making any connections with line
terminals.
The wire number or color and terminal designations
referred to may vary. Check the wiring label inside the
control box access panel for the correct wiring.