Trane S*HF*20-75 Troubleshooting Manual page 133

Table 11: Diagnostics Troubleshooting Chart (continued)
Occupied Humidification
Setpoint Failure
Module: RTM
Occupied Zone Cool
Setpoint Failure
Used With: CVZT units.
Module: RTM
Occupied Zone Heat
Setpoint Failure
Used With: CVZT units,
VVDA/CVDA units w/DWU
option.
Module: RTM
RTM Auxiliary
Temperature Sensor
Failure
Module: RTM
RT-SVP07B-EN
Problem: The GBAS input
assigned to Occupied
Humidification Setpoint is
out of range (Humidity <
10% or Humidity > 90%).
Check: Wiring and
external devices on the
associated GBAS input.
Problem: The source
assigned to Occupied Zone
Cool Setpoint is out of
range (Temperature < 45 F
or Temperature > 94 F).
Check: Wiring and
external devices on the
associated RTM input.
Problem: The source
assigned to Occupied Zone
Heat Setpoint is out of
range (Temperature < 45 F
or Temperature > 94 F).
Check: Wiring and
external devices on the
associated RTM input.
Problem: The RTM Aux
Temperature Sensor has
been assigned to at least
one function, and this
sensor signal is out of range
(Temp < -55 F or Temp >
209 F).
Check: The HI value and
wiring between the RTM
module and the sensor.
Removing the plug from the
RTM module there should
be no shorts, opens and
sensor resistance should be
between 830 ohms and
345.7Kohms.
The Active Occupied
Humidification Setpoint
reverts to the default
Occupied Humidification
Setpoint from the Human
Interface.
The Active Occupied Zone
Cooling Setpoint reverts to
the default Occupied Zone
Cooling Setpoint of the
Human Interface.
The Active Occupied Zone
Heating Setpoint reverts to
the default Occupied Zone
Heating Setpoint of the
Human Interface.
The functions with the RTM
Aux Temperature input
designated as their sensor
are disabled.
DIAGNOSTICS Menu
(PAR) An automatic reset
occurs after the GBAS input
assigned to the Occupied
Humidification Setpoint
input returns to within
range for 10 continuous
seconds, or after a
different, valid Occupied
Humidification Setpoint
source is applied (BAS/
Network).
(PAR) An automatic reset
occurs after the source
input assigned to the
Occupied Zone Cooling
Setpoint input returns to
within range for 10
continuous seconds, or
after a different, valid
Occupied Zone Cooling
Setpoint source is applied
(BAS/Network).
(PAR) An automatic reset
occurs after the source
input assigned to the
Occupied Zone Heating
Setpoint input returns to
within range for 10
continuous seconds, or
after a different, valid
Occupied Zone Heating
Setpoint source is applied
(BAS/Network).
(PAR) An automatic reset
occurs after the designated
temperature input returns
to its allowable range. In
order to prevent rapid
cycling of the diagnostic,
there is a 10 seconds delay
before the automatic reset.
133