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WC-IOM-7 • Packaged Heat Pump 47
ReliaTel Control
The RTRM has the ability to provide the service personnel with some unit
diagnostics and system status information.
ƽWARNING
Hazardous Service Procedures!
The maintenance and 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. When possible,
disconnect all electrical power including remote disconnects 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.
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”.
To prevent injury or death from electrocution, it is the responsibility of the
technician to recognize this hazard and use extreme care when performing
service procedures with the electrical power energized.
1. Verify that the Liteport LED on the RTRM is burning continuously. If the LED is
lit, go to Step 3.
2. If the LED is not lit, verify that 24 VAC is presence between J1-1 and J1-2. If 24
VAC 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 Checkout
Procedure ” section, check the following:
System status
Heating status
Cooling status
If a System failure is indicated, proceed to Step 4. If no failures are indicated,
proceed to Step 5.
4. If a System failure is indicated, recheck Steps 1 and 2. If the LED is not lit in
Step 1, and 24 VAC is present in Step 2, the RTRM has failed. Replace the
RTRM.
5. If no failures are indicated, use one of the TEST mode procedures described
in the “Unit Start-Up” section to start the unit. This procedure will allow you
Troubleshooting