Trane Voyager Commercial, Инструкция по установке, эксплуатации и обслуживанию

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138 RT-SVX34R-EN
Table 79. Troubleshooting (continued)
SYMPTOM PROBABLE CAUSE RECOMMENDED ACTION
G. ODM 3 and/or 4 will not cycle.
1. OAS has failed.
1. Perform OAS Resistance/Temperature check.
Replace if necessary.
2. ODM3 and/or 4 capacitor has failed. 2. Check ODM capacitor, replace if necessary.
3. Wiring, terminal, or CC2 contactor failure.
3. Check wires, terminals, and CC2. Repair or replace
if necessary.
4. ODM3 and/or 4 has failed. 4. Check ODM, replace if necessary.
5. RTRM is defective.
5. Replace RTRM module
6. ODF20 has failed.
6. Check for proper voltage and contact closure.
ODF20 relay has a 24 VAC holding coil. If voltage is
present, replace relay.
H. CPR2 and 3 (if applicable) will not
operate.
1. No power to CC2 and/or 3 coil. Cool Failure
Possible.
1. Check wiring, terminals and applicable controls
(CCB2, CCB3, HPC2, LPC2, WTL2, WTL3, TDL2 &
TDL3)
2. CC2 and/or 3 coil defective. Cool Failure Indicated.
2. Verify integrity of CC2 and/or 3 coil windings. If
open or shorted replace CC2 and/or CC3.
3. CC2 and/or 3 contacts defective.
3. If 24 VAC is present at CC2 and/or 3 coil, replace
relay.
4. RTRM is defective.
4. 24 VAC is not present at CC2 and/or 3 coil. Reset
the Cool Failure by cycling the service disconnect.
Place the unit into Cool Stage 2 Mode, step 4 for
constant Volume or step 6 for variable air volume, to
insure CPR2 and 3 Compressor operation. Check
input devices in #1 & #2 above, if no controls have
opened, and CC2 and/or 3 will not close, replace
RTRM.
5. DLT2 and DLT3 has tripped.
4. Check for leaks, Open wire connections, Lose
quick connect terminals, TDL2 and TDL3 resistance
check.
I. Indoor motor (IDM) will not operate
1. IDM has failed.
1. Check IDM, replace if necessary.
2. Wiring, terminal, or contactor failure.
2. Check wiring, terminals and F contactor. Repair or
replace wiring, terminals, or fan contactor F.
3. ZSM is defective.
3. Place unit in test mode. If the fan operates in the
test mode, test the ZSM using the appropriate test
procedures.
4. RTRM is defective.
4. Check the RTRM fan output. Locate P2-1 on the
RTRM. Measure voltage to ground. If 24 VAC is not
present on a call for fan, replace the RTRM.
5. Supply Fan Proving (FFS) switch has opened.
5. Check FFS and belts, repair or replace if
necessary.
J. No Heat (YC’s only) CFM will not
run, IP warms up, GV is energized
1. CFM has failed.
1. Check CFM, replace if necessary.
2. CFM capacitor has failed.
2. Disconnect BROWN wires from capacitor, test, and
replace if necessary.
3. Wiring, or terminal failure.
3. Check wiring, and terminals. Repair, or replace if
necessary.
4. TNS3 and/or 4 has failed. (460/575 V units only)
4. Check for 230 VAC at TNS3 and/or 4 secondary,
between Y1 and Y2. If 230 VAC is not present,
replace TNS3 and/or 4.
5. Modulating gas is not configured properly.
5. Check RTOM wiring and control board software
versions.
K. No Heat (YC’s only) CFM runs, GV
energizes, IP does not warm up.
1. TNS3 and/or 4 has failed.
1. Check for 115 VAC at TNS3 and/or 4 secondary,
between X1 and X2. If 115 VAC is not present,
replace TNS3 and/or 4.
2. Wiring or terminal failure.
2. Check wiring and terminals. Repair or replace if
necessary.
3. IP has failed.
3. With 115 VAC applied to IP, warm up should take
place. Cold resistance of IP should be a minimum of
50 Ohms. Nominal current should be 2.5 to 3.0
Amps.
L. No Heat (YC’s only) GV does not
energize, CFM runs, IP warms up
1. Wiring or terminal failure.
1. Verify presence of 24 VAC between IGN J1-7
terminal to ground, if not present, check wiring and
terminals. Repair or replace if necessary.
2. GV has failed, in two stage units
2. Measure voltage between TH and TR on the gas
valve (GV). If 24 VAC is present and the GV will not
open, replace the GV.
3. Pressure switch failure, in mod heat units
3. In mod heat units, verify the pressure switch is
wired correctly. If wired correctly, verify operation of
pressure switch.
D Diia ag gn no ossttiiccss