138
RT-SVP07B-EN
DIAGNOSTICS Menu
Space Pressure Sensor
Failure
Used With: Power Exhaust
w/Statitrac option
(Building pressure control).
Module: ECEM
Problem: The unit is
reading a signal that is out
of range for the Space
Pressure Sensor transducer
input (During calibration: V
< 40 mV or V > 420 mV,
During operational times: V
< 40 mV or V > 0.75 V).
Check: Check unit wiring
between sensor and ECEM,
and solenoid and ECEM.
Check the transducer
assembly tubing and
operation of the calibration
solenoid which should
shunt the ambient pressure
(Windbird) to both the high
and low ports of the
transducer for a duration of
1 sec. every minute.
The Space Pressure Control
function is disabled, and
the exhaust fan and the
exhaust damper actuator
are controlled as if the unit
did not have Statitrac.
Default exhaust enable
point is used.
(PAR) An automatic reset
occurs after the designated
Space Pressure transducer
sends a signal within range
for 10 continuous seconds.
Space Static Pressure
Setpoint Failure
Used With: Power Exhaust
w/Statitrac option
(Building pressure control).
Module: ECEM
Problem: The GBAS input
assigned to the Space
Static Pressure Setpoint is
out of range (Input < 0.03
IWC or Input > 0.20 IWC).
Check: The wiring between
the GBAS input assigned to
this setpoint and the
external device.
The Active Space Pressure
Setpoint will revert to the
default Space Pressure
Setpoint from the Human
Interface.
(PAR) An automatic reset
occurs after the source
input assigned to the Space
Pressure Setpoint input
returns to within range for
10 continuous seconds, or
after a different, valid
Space Pressure Setpoint
source is applied (BAS/
Network).
Supply Air Pressure
Sensor Failure
Used With: VVDA.
Module: RTM
Problem: The Supply Air
Pressure sensor voltage
input is out of range (Input
< 40mV or Input > 4.75V)
Check: Check field/unit
wiring between Sensor and
RTM.
The IGV will drive closed or
supply fan speed to
minimum, and the
following functions are
disabled;
a. SA Pressure Control
b. SA Static Pressure Limit
(PAR) An automatic reset
occurs after the SA
Pressure input returns to its
allowable range for 10
seconds.
Supply Air Pressure
Setpoint Failure
Used With: VVDA.
Module: RTM
Problem: The GBAS input
assigned to the Supply Air
Pressure Setpoint is out of
range (Input < 1.0 IWC or
Input > 4.3 IWC).
Check: The wiring between
the GBAS input assigned to
this setpoint and the
external device.
The default Supply Air
Pressure Setpoint at the
Human Interface will
become the Active Supply
Air Pressure SETPOINT.
(PAR) An automatic reset
occurs after the source
input assigned to the
Supply Air Pressure
Setpoint input returns to
within range for 10
continuous seconds, or
after a different, valid
Supply Air Pressure
Setpoint source is applied
(BAS/Network).
Table 11: Diagnostics Troubleshooting Chart (continued)
