RT-SVP07B-EN 143
DIAGNOSTICS Menu
Velocity Pressure
Sensor Failure
Used With: IPak I Fresh
Air Measurement (VCM)
option.
Module: VCM
Problem: The velocity
pressure input signal is out
of range (During
calibration: volts < 40 mV
or volts > 420 mV, During
operational times: volts <
40 mV or volts > 0.75 V).
Check: Check unit wiring
between sensor and VCM,
and solenoid and VCM.
Check the transducer
assembly tubing and
operation of the calibration
solenoid which should
shunt the differential
pressure of the track
sensor to both the high and
low ports of the transducer
for a duration of 1 sec.
every minute.
Airflow measurement will
be disabled and the unit will
revert to OA CFM
Compensation Function if
enabled, or to the default
OA Damper Minimum
Position.
(PAR) An automatic reset
occurs after the designated
velocity pressure
transducer sends a signal
within range for 10
continuous seconds.
Velocity Pressure
Sensor Failure (Left or
Right)
Note: “Left” and “Right”
are the left side of the unit,
or right side, relative to
someone facing the control
box of the unit.
Used With: IPak II Fresh
Air Measurement (VCM)
option.
Module: VCM
Problem: The velocity
pressure input signal of the
designated flow station is
out of range (During
calibration: volts < 40 mV
or volts > 420 mV, During
operational times: volts <
40 mV or volts > 0.75 V).
Check: Check unit wiring
between sensor and VCM,
and solenoid and VCM.
Check the transducer
assembly tubing and
operation of the calibration
solenoid which should
shunt the differential
pressure of the traq sensor
to both the high and low
ports of the transducer for a
duration of 1 sec. every
minute.
Airflow measurement will
be disabled and the unit will
revert to OA CFM
Compensation Function if
enabled, or to the default
OA Damper Minimum
Position.
(PAR) An automatic reset
occurs after the designated
velocity pressure
transducer sends a signal
within range for 10
continuous seconds.
VOM Communications
Failure
Module: VOM
Problem: The RTM has lost
communications with the
VOM module.
Check: Check unit wiring
between RTM and VOM
module.
Ventilation override actions
will not be allowed, and the
VOM Output relay will be
de-energized.
(PAR) An automatic reset
occurs after
communication has been
restored.
Table 11: Diagnostics Troubleshooting Chart (continued)
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