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To manually reset ASTP, the compressor should be stopped
and allowed to cool. If the compressor is not stopped, the motor
will run until the motor protector trips, which occurs up to
90 minutes later. Advanced scroll temperature protection will
reset automatically before the motor protector resets, which
may take up to 2 hours.
High Discharge Gas Temperature Protection
— Units
equipped with optional digital compressors have an additional
thermistor located on the discharge line, If discharge tempera-
ture exceeds 265 F (129.4 C), the digital compressor will be
shut off.
Alarms will also occur if the current sensor board malfunc-
tions or is not properly connected to its assigned digital input. If
the compressor is commanded OFF and the current sensor
reads ON, an alert is generated. This will indicate that a com-
pressor contactor has failed closed. In this case, a special mode,
Compressor Stuck on Control, will be enabled and all other
compressors will be turned off. An alarm will then be enabled
to indicate that service is required. Outdoor fans will continue
to operate. The condenser output is turned on immediately.
Alarms and Alerts — These are warnings of abnormal
or fault conditions, and may cause either one circuit or the
whole unit to shut down. They are assigned code numbers as
described in Table 38.
Automatic alarms will reset without operator intervention if
the condition corrects itself. The following method must be
used to reset manual alarms:
Before resetting any alarm, first determine the cause of the
alarm and correct it. Enter the Alarms mode indicated by the
LED on the side of the scrolling marquee display. Press
and until the sub-menu item RCRN “RESET
ALL CURRENT ALARMS” is displayed. Press .
The control will prompt the user for a password, by displaying
PASS and WORD. Press to display the default pass-
word, 1111. Press for each character. If the password
has been changed, use the arrow keys to change each individu-
al character. Toggle the display to “YES” and press .
The alarms will be reset.
Fig. 25 — Advanced Scroll Temperature
Protection Label
ENTER
ENTER
ENTER
ENTER
ENTER
Fig. 26 — Recommended Minimum Cool Down Time After Compressor is Stopped*
0
10
20
30
40
50
60
70
80
90
100
110
120
0 102030405060708090
Compressor Unloaded Run Time (Minutes)
Recommended Cooling Time
(Mi
nut
es)
*Times are approximate.
NOTE: Various factors, including high humidity, high ambient temperature,
and the presence of a sound blanket will increase cool-down times.