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ReliaTel Refrigeration Module (RTRM) Default Chart
54
Troubleshooting
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 pressing the 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.\
Table 9.
System mode and fan selection chart
Resistance Valves
Zone Sensor
(Ohms)
Unit/Fan Mode
2.32K
Off/ Auto
4.87K
Cool/Auto
7.68K
Auto/Auto
10.77K
Off/On
13.32K
Cool/On
16.13K
Auto/On
19.48K
Heat/Auto
27.93K
Heat/On
35.0K
Emergency Heat/Auto
43.45K
Emergency Heat/On
Out of Range (Short)
INVALID/Short
Out of Range (Open)
INVALID/Open
If the RTCI loses input from the building management 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.
4. Locate the RTRM (J6). Connect two (2) wires to terminals J6-1 and 2.
5. Connect the sensor (OAS) using two wire nuts to the two (2) field supplied
wires that were connected to terminals 1 and 2 on J6.
Local Fan
Local Unit Mode
Mode
Off
Auto
Cool
Auto
Auto
Auto
Off
On
Cool
On
Auto
On
Heat
Auto
Heat
On
Emergency Heat
Auto
Emergency Heat
On
Invalid (CV), Auto (VAV)
Invalid
Invalid (CV), Off (VAV)
Invalid
Packaged Heat Pump • WC-IOM-7
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