57
Alert Code T412 (W2 without W1) — This alert occurs in
Thermostat mode when W2 is energized and W1 is not. Verify
thermostat and thermostat wiring. When W2 turns On, the soft-
ware will behave as if W1 and W2 are both On. When W2
turns Off, the software will behave as if W1 and W2 are both
Off. This alert resets automatically when W1 is turned On.
Alert Code T413 (Y and W Simultaneously) — This alert
occurs in Thermostat mode when Y1 or Y2 is energized simul-
taneously with W1 or W2. Verify thermostat and thermostat
wiring. The software will enter either the cooling or heating
mode depending upon which input turned on first. This alert
resets automatically when Y1 and Y2 are not on simultaneous-
ly with W1 and W2.
Alert Code T414 (Economizer Damper Actuator Out of
Calibration) — This alert occurs when the economizer range
of motion is less than 90 degrees. Initiate economizer calibra-
tion (
Service Test
→
INDP
→
E.CAL
) using the Service Test
menu. The economizer calibration procedure will try to find
new maximum open and closed positions. If the alert does not
clear automatically after the calibration procedure is complete,
investigate what is limiting economizer rotation. This alert re-
sets automatically.
Alert Code T414 (Economizer Damper Actuator Torque
Above Load Limit) — This alert occurs when the actuator
load is too high. Investigate to determine what is increasing
damper load. This alert resets automatically.
Alert Code T414 (Economizer Damper Actuator Hunting
Excessively) — This alert occurs when the commanded
damper position is changing too rapidly. This alert resets
automatically.
Alert Code T414 (Economizer Damper Stuck or Jammed)
— This alarm occurs when the actuator senses it can no longer
move. Investigate what is stopping the rotation of the actuator
and fix. This alert resets automatically.
Alert Code T414 (Economizer Damper Actuator Mechani-
cal Failure) — This alert occurs when the actuator senses a
catastrophic failure. Investigate actuator and replace if neces-
sary. This alert resets automatically.
Alert Code T414 (Economizer Damper Actuator Direction
Switch Wrong Position) — This alert occurs when the econo-
mizer damper direction switch is in the wrong position.
The direction switch should be in the clockwise position and
the actuator should be mounted so that the CW face of the
actuator is accessible. Correct if necessary. This alert clears
automatically.
Alert Code T415 (IAQ Input Out of Range) — This alert oc-
curs when the IAQ input is less than 3.5 mA and the sensor is
configured as installed. Check sensor and wiring. This alert
clears automatically.
Alert Code T416 (OAQ Input Out of Range) — This alert
occurs when the OAQ input is less than 3.5 mA and the sensor
is configured as installed. Check sensor and wiring. This alert
clears automatically.
Cooling Troubleshooting —
Use the Scrolling Mar-
quee display or a CCN device to view the cooling status display
and the cooling diagnostic display (see Appendix A) for infor-
mation on the cooling operation. Check the current alarms and
alarm history for any cooling alarm codes and correct any causes
(see Table 43). Verify any unique control configurations per in-
stalled site requirements or accessories. If alarms conditions are
corrected and cleared, operation of the compressors and fans
may be verified by using the Service Test mode (see page 36 and
Table 36). See Table 44 for general cooling service analysis.
Humidi-MiZer™ Troubleshooting —
Use the unit
Scrolling Marquee display or a CCN device to view the
cooling status display and the cooling diagnostic display (see
Appendix A) for information on the cooling operation and the
related Humidi-MiZer operation. Check the current alarms and
alarm history for any cooling alarm codes and correct any
causes (see Table 43). Verify any unique control configurations
per installed site requirements or accessories. If alarm condi-
tions are corrected and cleared, operation of the compressors,
fans, and Humidi-Mizer valves may be verified by using the
Service Test mode (see page 36 and Table 36). In addition to
general cooling service analysis Table 44, see Table 45 for
general Humidi-MiZer service analysis.
Economizer Troubleshooting —
Use the unit Scroll-
ing Marquee display or a CCN device to view the economizer
status display and the economizer diagnostic display (see Ap-
pendix A) for information on the economizer operation. Check
the current alarms and alarm history for any economizer alarm
codes and correct any causes (see Table 43). Verify any unique
control configurations per installed site requirements or acces-
sories. If alarms conditions are corrected and cleared, operation
of the economizer may be verified by using the Service Test
mode (see Service Test section on page 36 and Table 36). The
following steps specify how to test the economizer using
the Scrolling Marquee display. See Table 46 for general econo-
mizer service analysis.
1. Enter the
Service Test
main menu on the display.
2. Enter
TEST
and turn ON test mode. A password may be
needed in order to turn ON the Service Test. The default
password is 1111.
3. Return to the main level of
Service Test
.
4. Enter the
INDP
submenu and enter an initial value for
ECON
. This will drive the economizer damper to the
specified position. Continue to adjust the
ECON
value to
make sure the economizer opens and closes.
5. Because of a mechanical problem with the economizer,
the actuator might acquire a new degree of rotation
which is less than 90 degrees. If this occurs, a “T414
Economizer Damper Actuator Out of Calibration” alert
will be generated. This alert can only occur if the econo-
mizer is using digital communications (
Configuration
→
ECON
→
E.CTL =
1 or 2
). The economizer calibration
procedure (
Service Test
→
IND.P
→
E.CAL
) will recon-
figure the actuator to the new fully closed and fully open
positions. To implement the calibration procedure,
change
E.CAL
from OFF to ON.
E.CAL
will remain ON
as long as the calibration procedure is being implemented
(as long as 5 minutes). During the calibration procedure
the actuator will close fully and then open fully. After the
calibration is complete, the degree of rotation should be
greater than 90 degrees, causing the T414 alert to clear. If
the T414 alert does not clear, check the economizer
damper for other mechanical problems.
6. Return to
Service Test
→
TEST
and turn OFF test mode.
This will cause the unit to return to normal operation.
Содержание 48PG24
Страница 68: ...68 Fig 14 Low Voltage Control Schematic 48PG20 28 Units without Humidi MiZer System a48 7627...
Страница 69: ...69 Fig 15 Low Voltage Control Schematic 48PG20 28 Units with Humidi MiZer System a48 8227...
Страница 70: ...70 Fig 16 Low Voltage Control Schematic 50PG20 28 Units without Humidi MiZer System a48 7778...
Страница 71: ...71 Fig 17 Low Voltage Control Schematic 50PG20 28 Units with Humidi MiZer System a50 8101...
Страница 72: ...72 Fig 18 Power Schematic Units without Humidi MiZer System a48 7628...
Страница 73: ...73 Fig 19 Power Schematic Units with Humidi MiZer System a48 8228...
Страница 74: ...74 Fig 20 Component Arrangement Units without Humidi MiZer System a48 8229...
Страница 75: ...75 Fig 21 Component Arrangement Units with Humidi MiZer System a48 8230...
Страница 105: ......