31
Ale r t A168 -- SPACE RELATIVE HUMIDITY OPEN SENSOR
This alert occurs when the SPRH input is 0 mA and the sensor is
configured as installed. Check sensor and wiring. This alert clears
automatically .
Alert A16 9 -- SPACE HUMIDITY SHORTED SENSOR
This alert o ccurs when the SPRH input is shorted and the sensor is
configured as installed. Check sensor and wiring. This alert clears
automatically .
Alert A17 0 – ECON FEEDBACK RANGE
This alert occurs when the Economizer analog feedback signal is
outside the range of 1.3vdc to 10.3vdc and the feedback is
configured to use. A short is 10.5vdc and an open circuit is less
than 0.1vdc. Economizer diagnostics operation will be disabled.
This is usually caused by a wiring problem, actuator failure, or the
wrong actuator. Investigate using the Low Voltage Schematic;
make sure the feedback signal from the actuator is correct. This
alert clears automatically.
Alert A17 1 – ECON FEEDBACK OPEN
See Alert A170
Alert A17 2 – ECON FEEDBACK SHORTED
See Alert A170
Alert A19 0 – TSTAT HEAT/COOL CALLS
This alert occurs in Thermostat mode when Y1, Y2, or Y3 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, Y2, and Y3 are not on
simultaneously with W1 and W2.
Alert A19 1 – TSTAT IMPROPER COOL
This alert occurs in Thermostat mode when Y2 or Y3 is energized
and Y1 is not. Verify thermostat and thermostat wiring. When this
occurs the control will treat the inputs as a number instead of
specific input. Example a Y2 and Y3 would mean 2 cooling inputs
so the control would treat that as is a Y1 and Y2 was active. This
alert resets automatically when Y1 is turned On.
Alert A19 2 – TSTAT IMPROPER HEAT
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.
Fault F200 – FIRE S HUTDOWN
This fault occurs when the fire shutdown input is either open or
closed depending upon its configuration. This fault is usually
caused by an auxiliary device that is trying to shut down the unit,
e.g., smoke detector. This will cause a unit shutdown condition.
Verify that the configuration is set correct, verify the wiring and
auxiliary device. This fault resets automatically.
Fault F201 – CONDENSATE OVERFLOW
This fault occurs when the COFS input is either open or closed
depending upon its configuration. This fault is usually caused by
water reaching a high level in the drain pan. This will cause a
cooling lockout. Verify that the configuration is set correct, verify
the wiring and auxiliary device. This fault resets automatically .
Alert A203 – DIRTY FILTER
This alert occurs when the Filter Status switch senses a plugged
filter for 5 continuous seconds after the indoor fan has been
running for 10 seconds or if the fan has run for longer than the
change filter time. Because the Dirty Air Filter switch can be
configured normally opened or closed, the switch might be open or
closed. Verify that the configurations are set correct, verify the
wiring and filter status switch. The hose should be connected to the
low side of the switch. The alert resets automatically if it was
tripped due to the filter switch. If the alert is tripped because of the
timer, it will need to be reset after the filter has been replaced or
inspected. Rest the time with the RESET FILTER TIME point is
located under RUN STATUS GENERAL or INPUTS
GENERAL INPUTS.
Fault F204 – REMOTE SHUTDOWN
This fault occurs when the remote shutdown input is either open or
closed depending upon its configuration and configured to set a
fault. This fault is usually caused by an auxiliary emergency device
that is trying to shut down the unit. This will cause a unit shutdown
condition. Verify that the configuration is set correct, verify the
wiring and auxiliary device. This fault resets automatically.
Alert A210 – GENERAL STATUS
This alert occurs when the general status input is either open or
closed depending upon its configuration and configured to set a
alert. This alert is usually caused by an auxiliary switch device that
is trying to send a warning about the unit. Verify that the
configuration is set correct, verify the wiring and auxiliary device.
This alert resets automatically.
Fault F211 – GENERAL STATUS
This fault occurs when the general status input is either open or
closed depending upon its configuration and configured to set a
fault. This fault is usually caused by an auxiliary switch device that
is trying to shut down the unit. This will cause a unit shutdown
condition. Verify that the configuration is set correct, verify the
wiring and auxiliary device. This fault resets automatically.
Fault F310 – CIRA DOWN DUE TO FAIL
This fault occurs when both compressors on circuit A have 3
strikes. Investigate the alerts that caused the strikes to occur, and
correct or test as needed. Manual alarm reset or power cycle is
required to rest this fault.
Fault F311 – CIRA LOW CHARGE
This alert occurs when the compressors are off and both the
discharge and suction pressure are less than the low charge level
(LOW CHARGE LEVEL
) and OAT is greater than the low charge
limit (NO LOW CHARGE OAT). The cause of the alert is usually
low refrigerant pressure or faulty pressure transducers. This alert
only occurs when the compressor is OFF because the low
refrigerant pressure alert will handle this situation when the
compressor is operating. Manual alarm reset or power cycle is
required to rest this fault.
Alert A31 2 – CIR.A UNEXPECTED OFF
These alerts occur when the suction pressure raises the configured
amount and the pressure ratio drop the configured amount both in
a 10 second window during compressor operation. When this
occurs, the control turns off the compressors and logs a strike for
which compressor that was on. This alerts reset automatically. The
possible causes are: high--pressure switch (HPS) open (The HPS is
wired in series with compressor relays on the MBB), compressor
internal protection is open, or a wiring error (a wiring error might
not allow the compressor to start).
Alert A3 13 – CIR.A HIGH DISCHARGE
This alert occurs when the discharge pressure is greater than the
configured CIR.A SDP LIMIT amount. This alert resets
automatically when the pressure falls 20 psig below the threshold.
When running both compressors the control will remove A1 and
add a strike to it. The control will also set the ODFs to the high
cool speed. The cause of the alert is usually an overcharged system,
high outdoor ambient temperature coupled with dirty outdoor coil,
plugged filter drier, or ODF speeds being set too low.
Alert A31 4 – CIR.A HPS TRIP
This alert occurs when the discharge high pressure switch opens.
This alert resets automatically when the pressure falls below the
switch threshold and the switch closes for 3 minutes. The control
will add a strike for which ever compressors were on. The control
will also set the ODFs to the high cool speed. The cause of the alert
is usually an overcharged system, high outdoor ambient
To Next Page
Loading...
