Trane Voyager Commercial, Инструкция по установке, эксплуатации и обслуживанию

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RT-SVX34R-EN 137
Troubleshooting
Table 79. Troubleshooting
SYMPTOM PROBABLE CAUSE RECOMMENDED ACTION
A. Unit will not operate. No Heat, No
Cool or No Fan operation.
1. No power to the Unit. 1. Check line voltage at service disconnect.
2. No power to the RTRM. 2. Check for 24 VAC at RTRM J1-1 to system ground.
3. Zone Sensor Module (ZSM) is defective or MODE
circuit is open. (VAV only) 3. See Zone Sensor Module (ZSM) Test Procedures or
short MODE input on VAV units.
4. RTRM is defective.
4. If 24 VAC is present at the RTRM J1-1 to ground,
the LED on the RTRM should be on. If the LED is not
lit, replace the RTRM.
5. Supply Fan Proving (FFS) switch has opened. 5. Check the IDM and belts, replace as necessary.
6. Emergency Stop input is open. 6. Check the Emergency Stop input.
CV or SZ VAV Units only
B. Unit will not Heat or Cool, but the
Fan switch operates.
1. Zone Sensor Module (ZSM) is defective.
1. Refer to the Zone Sensor Module (ZSM) Test
Procedures.
2. Problem in (ZSM) wiring.
2. Disconnect the ZSM wiring at RTRM and test the
wires using the Zone Sensor Test Procedures to
locate any wiring problems.
3. RTRM is defective.
3. Disconnect the ZSM wiring at the RTRM and
perform the Zone Sensor Module (ZSM) Test
Procedures. If within range, replace RTRM.
CV, SZ VAV or VAV (Unoccupied)
C. Unit heats and cools, but will not
control to set point.
1. Zone Sensor Module (ZSM) is defective.
1. Refer to the Zone Sensor Module (ZSM) Test
Procedures.Refer to the Default Chart.
2. Thermometer on the ZSM out of calibration. 2. Check and calibrate the thermometer.
D. CPR1 will not operate, ODM's will
operate.
1. Compressor failure.
1. Test compressor, mechanically and electrically.
Replace if necessary.
2. Wiring, terminal, or mechanical CC1 contactor
failure.
2. Check wires, terminals and CC1. Repair or replace
if necessary.
3. LPC1 has tripped
3. Leak check, repair, evacuate and recharge as
necessary. Check LPC1 operation.
E. CPR1 operates, ODM's will not
operate.
1. ODM has failed.
1. Check ODM's, replace if necessary.
2. ODM capacitor(s) has failed. 2. Check ODM capacitors, replace if necessary.
3. Wiring, terminal, or mechanical CC1 or CC2
contactor failure.
3. Check wires, terminals,CC1 and CC2. Repair or
replace if necessary.
4. ODF 20 or 34 relay has failed
4.Check for proper voltage and contact closure.
ODF20 and 34 have a 24 VAC holding Coil. If voltage
is present, replace relay.
5. RTRM is defective
5. Locate the P3 connector on the RTRM. Check for
24 VAC at terminal P3-6. If 24 VAC is not present,
replace RTRM.
F. CPR1 and ODM1 will not operate.
1. No power to CC1 coil. Possible Cool Failure
1. Check wiring, terminals and applicable controls
(CCB1, HPC1, TDL1, WTL1, LPC1)
2. CC1 coil defective. Cool Failure Indicated.
2. Check CC1 coil. If open or shorted, replace CC1.
3. CC1 contacts defective.
3. If 24 VAC is present at CC1coil, verify contact
closure.
4. RTRM is defective.
4. If 24 VAC is not present at CC1 coil, reset the Cool
Failure by cycling the main power disconnect switch.
Verify system MODE is set for cooling operation. If no
controls have opened, and CC1 will not close, replace
RTRM.
5. LPC1 has tripped
5. Leak check, repair, evacuate, and recharge as
necessary. Check LPC1 operation.
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