Reliatel Air Module (Rtom) Tests; Test 1: Testing The Variable Frequency Drive (Vfd) Output; Test 2: Testing The Vfd; Compressor-Blink Codes - Trane Voyager Commercial Installation, Operation And Maintenance Manual

D D i i a a g g n n o o s s t t i i c c s s
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.
N N o o t t e e s s : :
• 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," p. 67
VAV applications in the
step the unit to 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," p. 42 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.
136
procedure for SZ
"Startup," p. 42 section,
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.
N N o o t t e e s s : :
• 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.
N N o o t t e e : : If the compressor has tripped, the resistance will
be 4500 ohms or greater; when reset, it will be
less than 2750 ohms.
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.
Table 78. Blink codes
Fault LED on
PTC overheat or
short
PTC reset delay
blink
active
long
Phase loss
blink
Incorrect phase
short
sequence
blink
LED off LED on LED off
long short long
blink blink blink
long long long
blink blink blink
short short long
blink blink blink
RT-SVX34R-EN