Specifications

84
Alarm Code 404 (Fire Shutdown)
— This alarm occurs when
the fire shutdown input is active (either open or closed depend-
ing upon its configuration). If the fire shut down input is ener-
gized (fire shutdown is in effect), or if two fire smoke modes
are incorrectly energized at the same time, a fire shutdown
mode will occur. This is an emergency mode requiring the
complete shutdown of the unit. Recovery is automatic when
the inputs are no longer on.
This alarm is usually caused by an auxiliary device that is
trying to shut down the unit (e.g., smoke detector). The input
for Fire Shutdown is at Inputs
→ FIRE → FSD.Theswitch
logic configuration for this switch input can be found at
variable Configuration
→ SW.LG → FSD.L. Verify that the
configuration is set correctly, verify the wiring and auxiliary
device. This alarm resets automatically.
Alarm Code 405 (Evacuation Emergency Mode)
— Unit has
been placed in the fire evacuation mode by means of the exter-
nal command for evacuation (Inputs
→ FIRE → EVAC).
If the evacuation input on the CEM is energized, an evacua-
tion mode occurs which flags an alarm. This mode attempts to
lower the pressure of the space to prevent smoke from moving
into another space. This is the reverse of the Pressurization
mode. Closing the economizer, opening the return air damper,
turning on the power exhaust, and shutting down the indoor fan
will decrease pressure in the space. Recovery is automatic
when the input is no longer on.
Alarm Code 406 (Pressurization Emergency Mode)
— Unit
has been placed in the fire pressurization mode by means of the
External command for pressurization (Inputs
→ FIRE → PRES).
If the pressurization input on the CEM is energized, a pres-
surization mode occurs which flags an alarm. This mode at-
tempts to raise the pressure of a space to prevent smoke infiltra-
tion from another space. The space with smoke should be in an
Evacuation mode attempting to lower its pressure. Opening the
economizer, closing the return air damper, shutting down pow-
er exhaust, and turning the indoor fan on will increase pressure
in the space. Recovery is automatic when the input is no longer
on.
Alarm Code 407 (Purge Emergency Mode)
— Unit has been
placed in the fire pressurization mode by means of the External
command for pressurization (Inputs
→ FIRE → PURG).
If the smoke purge input on the CEM is energized, a smoke
purge mode occurs which flags an alarm. This mode attempts
to draw out smoke from the space after the emergency condi-
tion. Opening the economizer, closing the return air damper,
and turning on both the power exhaust and indoor fan will
evacuate smoke and bring in fresh air. Recovery is automatic
when the input is no longer on.
Alert Code 408 (Dirty Air Filter)
— If no dirty filter switch is
installed, the switch will read “clean filter” all the time. There-
fore the dirty filter routine runs continuously and diagnoses the
input. Because of the different possible times it takes to gener-
ate static pressure, this routine waits 2 minutes after the fan
starts before the dirty filter switch is monitored. If the dirty
filter switch reads “dirty filter” for 2 continuous minutes, an
alert is generated. No system action is taken. This is a reminder
that it is time to change the filters in the unit. Recovery from
this alert is through a clearing of all alarms (manual) or after
the dirty filter switch reads clean for 30 continuous seconds
(automatic).
Because the Dirty Air Filter switch can be configured nor-
mally opened or closed, the switch might be open or closed.
The configuration for this switch input can be found at variable
Configuration
→ SW.LG → SFS.L. Verify that the configura-
tion is set correctly. Verify the wiring and filter status switch.
The hose should be connected to the low side of the switch.
This alert resets automatically. The dirty filter switch is enabled
at Configuration
→ UNIT → SENS → FLT.S.
Alarm and Alert Codes 409 (Supply Fan Commanded On,
Sensed Off Failure and Supply Fan Commanded Off,
Sensed On Failure) —Both the alert and the alarm refer to the
same failure. The only difference between the alarm and alert is
that in the case where the supply fan status configuration to shut
down the unit is set to YES (Configuration
→ UNIT → SFS.S),
the alarm will be generated AND the unit will be shut down. It
is possible to configure Configuration
→ UNIT → SFS.M to
either a switch or to monitor a 0.2-in. wg rise in duct pressure if
the unit is VAV with duct pressure control (IGV or VFD).
The timings for failure for both are the same and are illus-
trated in the following table:
Unit Type/Mode minimum ON time minimum OFF time
wait wait
CV (no gas heat) 30 seconds 1 minute
CV (gas heat) 2 minutes 4 minutes
VAV (IGV/no gas heat) 2 minutes 4 minutes
VAV (VFD/no gas heat) 1 minute 1 minute
VAV (IGV/gas heat) 4 minutes 4 minutes
VAV (VFD/gas heat) 3 minutes 4 minutes
Recovery is manual. Reason for failure may be a broken fan
belt, failed fan relay or failed supply fan status switch.
Alert Code 414 (Loss of Communication with Belimo Actu-
ator)—The Belimo economizer motor is a digital controlled
motor. The ComfortLink™ control can monitor the status of
the motor. If there is a problem, this alert will occur. The
control will attempt to close the economizer dampers.
Alert Code 414 (Belimo Actuator Direction Error)
—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 414 (Belimo Actuator Failure)
— This alert oc-
curs when the commanded damper position is changing too
rapidly. This alert resets automatically.
Alert Code 414 (Belimo Actuator Hunting Alert)
— This
alert occurs when there is excess movement of the economizer
motor. Check the mechanical actuation of the dampers.
Alert Code 414 (Belimo Actuator Range Error)
—Thisalert
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.
Alert Code 420 (R-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.
Alert Code 420 (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 thermo-
stat. The jumper should only be left in place if the unit is
operating with a Space Temperature sensor.
Alert Code 421 (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 soft-
ware 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 422 (W2 without W1)
— This alert occurs in Ther-
mostat Mode when W2 is energized and W1 is not. Verify ther-
mostat 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.