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
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
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
Prior to any of the following maintenance procedures, shut off all power to the unit, to avoid personal injury.
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.
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
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.
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