Cooling Troubleshooting; Humidi- -Mizert Troubleshooting - Carrier 48PG03-16 Controls, Start-Up, Operation, Service And Troubleshooting Instructions

Alert Code T409 (Fan Status Switch Off, Fan Contactor
On)
This alert occurs when the fan status switch has sensed that the
indoor fan has been off for 10 seconds and the indoor fan
feedback has determined that the indoor fan should be on.
Because the Fan Status switch can be configured normally
opened or closed, the switch might be open or closed. The
configuration for this switch input can be found at
Configuration→UNIT→FN.SW. Verify that the configuration is
set correctly. Verify the wiring and fan status switch. The hose
should be connected to the high side of the switch. If the IDF is
configured to shut down the unit down when this alert occurs
(Configuration→UNIT→IDF.F = YES), then this alarm can
only be reset manually and the unit is shut down. If the IDF is not
configured to shut the unit down when this alert occurs
(Configuration→UNIT→IDF.F = NO), then this alert resets
automatically and no specific control action is taken.
Alert Code T410 (R-W1 Jumper Not Installed in Spare Temp
Mode)
This alert occurs when the control mode is Space Temperature
mode via Auto Select or Space Temp Select yet there is no power
to W1. Verify that space temperature mode is the desired mode or
add jumper between R and W1. This alert resets automatically.
Alert Code T410 (R-W1 Jumper Must be Installed to Run
Heat in Service Test)
This alert occurs when a request for a heat output has occurred
yet the W1 input is not high. A jumper must be installed between
R and W1 when trying to test heat in Service Test. The alert will
clear when Service Test is exited or if another Service Test mode
is selected. Remove jumper when done using Service Test if the
unit is operating with a thermostat. The jumper should only be
left in place if the unit is operating with a space temperature
probe.
Alert Code T411 (Y2 without Y1)
This alert occurs in Thermostat mode when Y2 is energized and
Y1 is not. Verify thermostat and thermostat wiring. When Y2
turns On, the software will behave as if Y1 and Y2 are both On.
When Y2 turns Off, the software will behave as if Y1 and Y2 are
both Off. This alert resets automatically when Y1 is turned On.
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 software 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
simultaneously 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 simultaneously 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 calibration (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 resets 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 Mechanical
Failure)
This alert occurs when the actuator senses a catastrophic failure.
Investigate actuator and replace if necessary. This alert resets
automatically.
Alert Code T414 (Economizer Damper Actuator Direction
Switch Wrong Position)
This alert occurs when the economizer 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 occurs 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 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. Check the
current alarms and alarm history for any cooling alarm codes and
correct any causes. (See Table 92.) Verify any unique control
configurations per installed 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 Table 86.) See Table 93 for general cooling service
analysis.

Humidi- -MiZert 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 92.) Verify any unique control configurations
per installed site requirements or accessories. If alarm conditions
are corrected and cleared, operation of the compressors, fans, and
Humidi-Mizer valves may be verified by using the Service Test
mode (See Table 86). In addition to general cooling service
analysis Table 93, see Table 94 for general Humidi-MiZer service
analysis.
82