RT-SVX25C-EN
53
Troubleshooting
Note:
Measurements should be made from LED common (ZSM terminal 6 to respective LED
terminal). Refer to the Zone Sensor Module (ZSM) Terminal Identification table at the
beginning of this section.
Programmable & Digital Zone Sensor Test
Testing serial communication voltage
1.
Verify 24 VAC is present between terminals J6-14 & J6-11.
2. Disconnect wires from J6-11 and J6- 12. Measure the voltage between J6-11 and J6-12, should
be about 32 VDC.
3. Reconnect wires to terminals J6-11 and J6-12. Measure voltage again between J6-11 and J6-12,
voltage should flash high and low every 0.5 seconds. The voltage on the low end will measure
about 19 VDC, while the voltage on the high end will measure from approximately 24 to 38 VDC.
4. Verify all modes of operation, by running the unit through all of the steps in the “Test Modes”
section discussed in “Unit Start-Up”.
5. After verifying proper unit operation, exit the test mode. Turn the fan on continuously at the
ZSM, by pressingthe button with the fan symbol. If the fan comes on and runs continuously,
the ZSM is good. If you are not able to turn the fan on, the ZSM is defective.
ReliaTel Refrigeration Module (RTRM) Default Chart
If the RTCI loses input from the buildingmanagement system, the RTRM will control in the default
mode after approximately 15 minutes. If the RTRM loses the Heating and Cooling setpoint input,
the RTRM will control in the default mode instantaneously.
The temperature sensing thermistor in the Zone Sensor Module is the only component required
for the “Default Mode” to operate.
Unit Operation without a Zone Sensor
This procedure is for temporary operation only. The economizer and condenser fan cycling
functions are disabled.
1.
Open and Lock the unit disconnect switch.
2. Remove the Outside Air Sensor (OAS) from the condenser section of unit.
3. Use two (2) wire nuts, to individually cap the wires.
Table 12. System mode and fan selection
Resistance Valves
(Ohms)
Zone Sensor Unit/
Fan Mode
Local Unit Mode
Local Fan Mode
2.32K Off/
Auto
Off
Auto
4.87K Cool/Auto
Cool
Auto
7.68K Auto/Auto
Auto
Auto
10.77K Off/On Off
On
13.32K Cool/On Cool
On
16.13K Auto/On Auto
On
19.48K Heat/Auto
Heat
Auto
27.93K Heat/On
Heat
On
35.0K
Emergency Heat/Auto Emergency Heat
Auto
43.45K
Emergency Heat/On
Emergency Heat
On
Out of Range(Short)
INVALID/Short
Invalid (CV), Auto (VAV) Invalid
Out of Range (Open) INVALID/Open
Invalid (CV), Off (VAV) Invalid
Содержание TC*150-301
Страница 13: ...RT SVX25C EN 13 Unit Dimensions Figure 1 WITHOUT ECONOMIZER 5 8 WITH ECONOMIZER 5 0 ...
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Страница 31: ...RT SVX25C EN 31 Installation Figure 18 Typical field wiring diagrams for optional controls ReliaTel only ...
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