132 RT-SVX34C-EN
Diagnostics
Method 1
To reset the system from the space, turn the "Mode" selection switch at the zone sensor to the "Off"
position. After approximately 30 seconds, turn the "Mode" selection switch to the desired mode,
i.e. Heat, Cool or Auto.
Method 2
To reset the system at the unit, cycle the unit power by turning the disconnect switch "Off" and then
"On".
Lockouts can be cleared through the building management system. Refer to the building
management system instructions for more information.
Zone Temperature Sensor (ZSM) Service Indicator
The ZSM SERVICE LED is used to indicate a clogged filter, an active Smoke Detector, or a Fan Failure
trip.
Clogged Filter Switch
This LED will remain on 2 minutes after the Normally Open switch is closed. The LED will be turned
off immediately after resetting the switch (to the Normally Open position), or any time that the IDM
is turned off.
If the switch remains closed, and the IDM is turned on, the SERVICE LED will be turned on again
after the 2 (±1) minutes.
This LED being turned on will have no other affect on unit operation. It is an indicator only.
Smoke Detector Switch
The LED will flash anytime that the N.O. Smoke Detector input is closed and will be reset anytime
that the input is returned to its N.O. state. During an Active Smoke Detector trip the unit will be shut
down.
Fan Failure Switch
The LED will flash 40 seconds after the fan is turned "On" if the Fan Proving Switch is not made.
This LED will remain flashing until the unit is reset by means explained above. If the "Fan Failure"
switch opens for at least 40 seconds during fan operation (indicating a fan failure) the unit will stop.
RTRM Zone Sensor Module (ZSM) Test
Note: These procedures are not for programmable or digital models and are conducted with the
Zone Sensor Module electrically removed from the system.
Table 72. Zone Sensor Module (ZSM) Terminal Identification (Constant Volume only)
Terminal # Terminal I.D. Terminal # Terminal I.D.
J6-1 ZTEMP J6-6 LED COMMON
J6-2 SIGNAL COMMON J6-7 HEAT LED
J6-3 CSP* J6-8 COOL LED
J6-4 MODE J6-9 SYS ON LED
J6-5 HSP J6-10 SERVICE LED