38
Power Loss (Outage or Brownout) —
All setpoints and advanced settings are restored* after any
power loss or interruption.
* All settings are stored in non---volatile flash memory .
Status —
Use the Status menu (see Table 12) to check the parameter
values for t he various devices and sensors configured.
NOTE: See “Interface Overview” on page 26 for
information about menu naviga tion and use of the keypad.
Checkout Tests —
Use the Checkout menu (on page 31) to test the damper
operation and any configured outputs. Only items that are
configure d are shown in the Checkout menu.
NOTE: See “Interface Overview” on page 26 for
information about menu naviga tion and use of the keypad.
To perform a Chec kout test:
1. Scroll to the desired test in the Checkout menu using
the the
and buttons.
2. Press the
button to select the item.
3. RUN? appears.
4. Press the
button to start the test.
5. The unit pauses and then displays IN PROGRESS.
6. When the test is complete, DONE appears.
7. When all desired parameters have been tested, press
the
(Menu up) button to end the test.
The Checkout tests can all be performed at the time of
installatio n or at any time du rin g the operation of the system
as a test that the system is operable.
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment
dama ge.
Be sure to allow e nough time for compressor startup
and shutdown between checkout tests so that you do
not short--cycle the compressors.
CAUTION
!
Troubleshooting
Alarms —
The economizer m odule provides alarm me ssages that
display on the 2--line LCD.
NOTE: Upon power up, the module wait s 60 minutes
before checking for alarms. This allows time for all the
configured devices (e.g. sensors, actuator) to become
operat ional. The exception is the SAT sensor which will
alarm immediately.
If one or more alarms are present and there has been no
keypad activity for at least 5 minutes, the Alarms menu
displays and cycles through the active alarms.
You can also navigate to the Alarms menu at any time.
Clearing Alarms —
Once the alarm has been identified and the cause has been
removed (e.g. replaced faulty sensor), the alarm can be
cleared from the display.
To clear an alarm, perform the following:
1. Navigate to the desired alarm.
2. Press the
button.
3. ERASE? displays.
4. Press the
button.
5. ALARM ERASED displays.
6. Press the
(Menu up/Exit) button to complete the
action and return to the previous menu.
NOTE: If the alarm still exists after you clear it, it is
redisplayed within 5 seconds.
2--Speed Indoor Fan Control System with Variable
Frequency Drive (Factory--Installed
Option)
For details on operating 549J 2--stage cooling units equipped
with the factory--installed 2--speed indoor fan control system
option, refer to the Variable Frequency Drive (VFD)
Installation, Start--Up and Service Instructions.
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