39
XC20
Idle mode — System is energized with no demand
— Decimal flashes at 1 Hertz > 0.5 second ON, 0.5 second OFF.
Display
Symbol or
Character
Display
Fan Test and Display String Option
Displayed
during start-up
or power
recycling.
Display string shows outdoor control firmware version
> pause>
or
unit >pause>unit capacity in BTUs>pause >unit code. If 3
horizontal bars are displayed during any sequence of this display string, it indicates that the specific parameter is not configured.
.
Idle mode — decimal flashes at 1 Hertz > 0.5 second ON, 0.5 second OFF
or
Indicates either cooling (
) or heating (
) mode and demand percentage.
Code displays when system is in defrost mode. To enter defrost mode, unit must be running in heating mode, outdoor ambient must
be below 65
F and outdoor coil temperature must be below defrost termination temperature.
Indicates outdoor fan RPM speed.
Control must be in Idle mode:
To enter fan test option -
mode, push and hold button
until solid – appears, release button. Display begins flashing. Within 10 seconds, push and
hold button until required symbol
displays, release button. Display begins flashing. With
in 10 seconds, push and hold button until display stops flashing, release button. Control
outputs DC voltage on PWM and COM terminals. Outdoor fan cycles
ON
for 10 minutes at
490 RPM. To exit test – Push and hold button until three horizontal bars display. Release
button, outdoor fan cycles
OFF
.
in the display string represents the
ambient temperature in
F at the
sensor on the outdoor unit. In display
configuration mode, it also repres
ents the option for enabling both coil
and liquid line temperature on the
7-segment display string.
Control can be in Idle or demand mode
: To enter display configuration option -
mode, push
and hold button until solid – appears, release button. Display begins flashing. Within 10 sec
onds, push and hold button until required symbol
displays, release button. Display begins
flashing. Within 10 seconds, push and hold button until display stops flashing, release button.
Display shows error (
) code(s), ambient (
), outdoor coil (
) and liquid (
) temperatures in
Fahrenheit.
NOTE - If button is not pushed in the 10-second time period, the control exits the test mode. If
this occurs, test mode must be repeated.
Error Code Recall Mode
(NOTE - control must be in idle mode
)
To enter error code recall mode, push and hold button until solid
appears, then release button. Control displays up to 10 error codes stored
in memory. If
is displayed, there are no stored error codes.
—
—
—
To exit error code recall mode, push and hold button until solid three horizontal bars appear, then release button.
Note - Error codes are not
cleared.
To clear error codes stored in memory, continue to hold button while the 3 horizontal bars are displayed. Release button when solid
is
displayed.
Push and hold for one (1) second, release button. 7-Segment displays
and exits error recall mode.
FIELD TEST MODE OPERATION
The field test mode allows the unit to be put into diagnostic
mode and allows the installer to perform multiple tests on
the control / unit.
Diagnostic Mode
Diagnostic mode is only available when the system is idle
or during an active / suspended call for heating or cooling.
Diagnostic mode is terminated when the exit command is
given, the button is pressed and released without entering
the diagnostic menu or 10 minutes has passed, whichever
comes first.
When this mode is selected all installed temperature
sensor valves (non-open and non-short) are shown on the
7-segment display. The following system status codes are
displayed:
D
Cooling
D
Percentage demand operation
D
Outdoor fan RPM
D
Active error codes
Outdoor Fan Mode
Diagnostic mode is only available while the system is in idle
mode. This mode can be exited with the proper command
or after 10 minutes has passed.
In diagnostic mode, the control energizes the outdoor fan
at the highest speed. The control continuously displays the
fan RPM on the 7-segment display.
PUMP-DOWN MODE OPERATION
1. Turn room thermostat
OFF
.
2. Install a set of refrigerant gauges on the system to
monitor the pressure.
NOTE -
All operation monitoring devices: High pressure
switch, low pressure switch and compressor internal vacu
um protection remain active in the system. This will prevent
the compressor from recovering all the system refrigerant
into the outdoor unit.
NOTE -
If the pump-down jumper is in the ON position dur
ing power-up, it is ignored.
3. Move the
Pump-Down
jumper (page 26 for location)
from the
OFF
position to the
ON
position.
Содержание XC20-024-230-01
Страница 45: ...45 XC20 Unit Wiring Diagrams Figure 22 Typical Unit Wiring XC20 024 and 036...
Страница 46: ...46 XC20 Figure 23 Typical Unit Wiring XC20 048 and 060...
Страница 48: ...48 XC20 Factory Wiring Diagrams Figure 25 Typical Factory Wiring XC20 024 and 036...
Страница 49: ...49 XC20 Figure 26 Typical Factory Wiring XC20 048 and 060...
