Troubleshooting; System Status Checkout Procedure; Method 1 - Trane WSC036E Installation, Operation And Maintenance Manual

Troubleshooting

WARNING
Hazardous Service Procedures!
The troubleshooting procedures recommended in this
section of the manual could result in exposure to
electrical, mechanical or other potential safety hazards.
Always refer to the safety warnings provided
throughout this manual concerning these procedures.
Unless specified otherwise, disconnect all electrical
power including remote disconnect and discharge all
energy storing devices such as capacitors before
servicing. Follow proper lockout/tagout procedures to
ensure the power can not be inadvertently energized.
When necessary to work with live electrical
components, have a qualified licensed electrician or
other individual who has been trained in handling live
electrical components perform these tasks. Failure to
follow all of the recommended safety warnings
provided, could result in death or serious injury.
The RTRM has the ability to provide the service personnel
with some unit diagnostics and system status information.
Before turning the main power disconnect switch "Off" ,
follow the steps below to check the ReliaTel Refrigeration
Module (RTRM). All diagnostics & system status
information stored in the RTRM will be lost when the main
power is turned "Off" .
WARNING
Live Electrical Components!
During installation, testing, servicing and
troubleshooting of this product, it may be necessary to
work with live electrical components. Have a qualified
licensed electrician or other individual who has been
properly trained in handling live electrical components
perform these tasks. Failure to follow all electrical
safety precautions when exposed to live electrical
components could result in death or serious injury.
1. Verify that the Liteport LED on the RTRM is burning
continuously. If the LED is lit, go to
2. If the LED is not lit, verify that 24 VAC is presence
between J1-1 and J1-2. If 24VAC is present, proceed to
Step 3. If 24 VAC is not present, check the unit main
power supply, check transformer (TNS1). Proceed to
Step 3 if necessary.
3. Utilizing "Method 1" or "Method 2" in the "System
Status Diagnostic" section, check the following:
• System status
• Heating status
• Cooling status
If a System failure is indicated, proceed to
failures are indicated, proceed to
RT-SVX23F-EN
4. If a System failure is indicated, recheck
5. If no failures are indicated, use one of theTEST mode
6. Step the system through all of the available modes,
7. If no abnormal operating conditions appear in the test
8. Refer to the individual component test procedures if
System Status Checkout
Procedure
"System Status" is checked by using one of the following
two methods:

Method 1

If the Zone Sensor Module (ZSM) is equipped with a
remote panel with LED status indication, you can check the
unit within the space. If the ZSM does not have LED's, use
Method 2. BAYSENS110*, BAYSENS109*, BAYSENS119*,
& BAYSENS023A all have the remote panel indication
feature.The LED descriptions are listed below.
LED 1 (System)
Step 3.
"On" during normal operation.
"Off" if a system failure occurs or the LED fails.
"Flashing" indicates test mode.
LED 2 (Heat)
"On" when the heat cycle is operating.
"Off" when the heat cycle terminates or the LED fails.
"Flashing" indicates a heating failure.
LED 3 (Cool)
"On" when the cooling cycle is operating.
Step 4. If no
"Off" when the cooling cycle terminates or the LED fails.
Step 5.
"Flashing" indicates a cooling failure.
2. If the LED is not lit in Step
in Step 2, the RTRM has failed. Replace the RTRM.
procedures described in the "Unit Start-Up" section to
start the unit.This procedure will allow you to check all
of the RTRM outputs, and all of the external controls
(relays, contactors, etc.) that the RTRM outputs
energize, for each respective mode. Proceed to
and verify operation of all outputs, controls, and
modes. If a problem in operation is noted in any mode,
you may leave the system in that mode for up to one
hour while troubleshooting. Refer to the sequence of
operations for each mode, to assist in verifying proper
operation. Make the necessary repairs and proceed to
Step 7 and Step 8.
mode, exit the test mode by turning the power "Off" at
the main power disconnect switch.
other microelectronic components are suspect.
Step 1 and Step
1, and 24 VAC is present
Step 6.
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