Trane Axiom GWS Series, Инструкция по установке, эксплуатации и обслуживанию

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72 WSHP-SVX015C-EN
should measure a voltage drop of 1.5 to 2.5 volts,
depending on your meter. Reverse bias will show an
over Load, or open circuit indication if LED is
functional.
Method 2
Testing the LED with an analog Ohmmeter. Connect
Ohmmeter across LED in one direction, then reverse
the leads for the opposite direction. The LED should
have at least 100 times more resistance in reverse
direction, as compared with the forward direction. If
high resistance in both directions, LED is open. If low in
both directions, LED is shorted.
Method 3
To test LED’s with ZSM connected to unit, test voltages
at LED terminals on ZSM. A measurement of 32 VDC,
across an unlit LED, means the LED has failed.
N No otte e:: 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
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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; it 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
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 23. System mode and fan selection chart
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
ReliaTel ™ ™ Refrigeration Module (RTRM)
Default Chart
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 functions are disabled.
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1. Open and Lock the unit disconnect switch.
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