SFan 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 (IDF.F = NO), then this alert resets automatically and no specific control action is taken.
Alert Code T410
SR−W1 Jumper Not Installed in Space 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.
SR−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 − Thermostat Y2 Input Activated without Y1 Activated
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 – Thermostat W2 Input Activated without W1 Activated
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 – Thermostat Y and W Inputs Activated 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
There are 6 different alerts under this one alert code. Pressing enter and esc on the marquee or navigator to expand the T414 alert will show you one of the below alerts. All these alerts are generated by the Belimo actuator and reported to the ECB. These alerts can only occur if the ECB is controlling the actuator digitally through MFT.
SEconomizer Damper Actuator Out of Calibration
This alert occurs when the economizer actuator reports a control angle (Operating Modes→ECON→C.ANG) less than the minimum control angle (Configuration→ECON→M.ANG). 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. After that step, run another calibration, but first power off unit (spring return the damper), loosen the actuator clamp, and while pushing the damper closed, tighten the clamp. This alert resets automatically.
SEconomizer Damper Actuator Torque Above Load Limit
This alert occurs when the actuator load is too high. Investigate to determine what is increasing damper load, and verify that the actuator is the correct size for the unit. This alert resets automatically.
SEconomizer Damper Actuator Hunting Excessively
This alert occurs when the commanded damper position is changing too rapidly. The stop jog ratio must be less than 21% to clear this alert. Leave the actuator powered with no signal for a few hours to allow the ratio to decrease (may have to wait longer than a few hours). If the alert continues, determine if the ECB or actuator is bad. This alert resets automatically.
SEconomizer Damper Stuck or Jammed
This alarm occurs when the actuator is no longer moving and the actual position is greater than or less than 3% of the commanded position for 20 seconds. Investigate what is stopping the rotation of the actuator and fix. This alert resets automatically.
SEconomizer Damper Actuator Mechanical Failure
This alert occurs when the actuator senses a catastrophic failure. Investigate actuator and replace if necessary. This alert resets automatically.
SEconomizer 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.
48/50PG and PM
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