Reliatel Air Module (Rtom) Tests; Compressor-Blink Codes - Trane Voyager CV Installation And Maintenance Manual

Diagnostics
2. Using the procedure described in
verify that the fan starts and the speed increases until
the SA Pressure reaches the "Setpoint" on VAV
Setpoint panel. If the fan does not start, check for "Fault
Conditions" on the VFD Keypad.
3. If no "Fault Conditions" exist and the fan started but
did not ramp up to speed, verify the "speed reference
voltage" output from the RTAM between terminals J4-
1 and J4-2.
4. If no "Fault Conditions" exist and the fan did not start,
verify that the Fan relay is energized and the VFD "Start
Command" is properly wired from the Fan relay, (24
volts on the Logic Input 2 (LI2) terminal). Verify that the
jumper between +24V and the LI1 terminal is properly
connected.
5. Verify that 115 Vac is present from the transformer on
the VFD assembly panel.
Notes:
• Begin troubleshooting by checking for any diagnostics.
See System Status/Diagnostics.
• Always verify the unit is operating in the proper
"MODE" when troubleshooting.

ReliaTel Air Module (RTOM) Tests

Test 1: Testing the Variable Frequency Drive
(VFD) Output.
1. Using the "Test Modes"
applications in the "Startup"
the fourth test (Step 4). Verify that 10 Vdc is present
between terminals J11-2 and J11-1.
2. If the voltage to the VFD is not present, verify that the
wires are properly connected between the RTRM or
COMM (Communications Module) and the RTOM.
3. If Step 2 checks out and the voltage is still not present
at the VFD output, replace the RTOM.
Test 2: Testing the VFD
1. Verify that the keypad in control box is powered. If not,
check the power wires to the VFD and the Keypad
cable.
2. Using the "Step Test Mode" procedure described in
the "Startup" section, step the unit to the fourth test
(Step 4). Verify that the fan starts and the speed
increases. If the fan does not start, check for "Fault
Conditions" on the VFD Keypad.
3. If no "Fault Conditions" exist and the fan started but
did not ramp up to speed, verify the "speed reference
voltage" output from the RTOM between terminals
J11-1 and J11-2.
4. If no "Fault Conditions" exist and the fan did not start,
verify that the Fan relay is energized and the VFD "Start
Command" is properly wired from the Fan relay, (24
volts on the Logic Input 2 (LI2) terminal). Verify that the
110
"Test Modes" , p.55,
procedure for SZ VAV
section, step the unit to
jumper between +24V and the LI1 terminal is properly
connected.
5. Verify that 115 Vac is present from the transformer on
the VFD assembly panel.
Notes:
• Begin troubleshooting by checking for any diagnostics.
See System Status/Diagnostics.
• Always verify the unit is operating in the proper
"MODE" when troubleshooting.
Compressor—Blink Codes
The CSHN*** large commercial compressors come
equipped with a compressor protection device capable of
detecting phase reversal, phase loss, and phase
unbalance. The compressor protection device uses a
Green and Red LED to indicate the compressor status. A
solid green LED denotes a fault-free condition; a blinking
red LED indicates an identifiable fault condition.
Note: If the compressor has tripped, the resistance will be
4500 ohms or greater; when reset, it will be less
than 2750 ohms.
Blink Code:
The blink code consists of different on / off
times of the Red LED which is repeated continuously until
either the fault is cleared or until power is cycled.
Fault LED on
PTC overheat or PTC
short blink
reset delay active
Phase loss long blink
Incorrect phase
short blink short blink short blink
sequence
LED off LED on LED off
long blink short blink long blink
long blink long blink long blink
long blink
RT-SVX34F-EN