69
System Troubleshooting Chart
Begin troubleshooting by checking for any diagnostics. See System Status/Diagnostics. Always verify the unit is operating in
the proper "MODE" when troubleshooting.
SYMPTOM
PROBABLE CAUSE
RECOMMENDED ACTION
A. Unit will not operate.
1. No power to the Unit.
1. Check line voltage at service disconnect.
No Heat, No Cool or No 2. No power to the RTRM.
2. Check for 24 VAC at RTRM J1-1 to system ground.
Fan operation.
3. Zone Sensor Module
3. See Zone Sensor Module (ZSM) Test Procedures or short MODE
(ZSM) is defective or MODE
input on VAV units.
circuit is open. (VAV only)
4. RTRM is defective.
4. If 24 VAC is present at the RTRM J1-1 to ground, the LED on the R
should be on. If the LED is not lit, replace the RTRM.
5. Supply Fan Proving (FFS)
5. Check the IDM and belts, replace as necessary.
switch has opened.
6. Emergency Stop input is
6. Check the Emergency Stop input.
open.
CV Units Only
1. Zone Sensor Module (ZSM)
1. Refer to the Zone Sensor Module (ZSM) Test Procedures.
B. Unit will not Heat or
is defective.
Cool, but the Fan
2. Problem in (ZSM) wiring.
2. Disconnect the ZSM wiring at RTRM and test the
switch operates.
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 RT
CV or VAV (Unoccupied)
1. Zone Sensor Module (ZSM)
1. Refer to the Zone Sensor Module (ZSM) Test Procedures.
C. Unit heats and cools,
is defective.
Refer to the Default Chart.
but will not control to
set point.
2. Thermometer on the ZSM
2. Check and calibrate the thermometer.
out of calibration.
D. CPR1 will not operate,
1. Compressor failure.
1. Test compressor, mechanically and electrically. Replace if necess
ODM's will operate.
2. Wiring, terminal, or
2. Check wires, terminals and CC1. Repair or replace if necessary.
mechanical CC1 contactor
failure.
3. LPC1 has tripped
3. Leak check, repair, evacuate and recharge as necessary.
Check LPC1 operation.
E. CPR1 operates,
1. ODM has failed.
1. Check ODM's, replace if necessary.
ODM's will not operate.
2. ODM capacitor(s) has failed.
2. Check ODM capacitors, replace if necessary.
3. Wiring, terminal, or
3. Check wires, terminals ,CC1 and CC2. Repair or replace if necess
mechanical CC1 or CC2
contactor failure.
4. ODF 20 or 34 relay has failed
4.Check for proper voltage and contact closure. ODF20 and 34 have
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
1. No power to CC1 coil.
1. Check wiring, terminals and applicable controls (CCB1, HPC1
not operate.
Possible Cool Failure
WTL1, LPC1)
2. CC1 coil defective.
2. Check CC1 coil. If open or shorted, replace CC1.
Cool Failure Indicated.
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 cycli
the main power disconnect switch. Verify system MODE is set for
cooling operation. If no controls have opened, and CC1 will not clos
replace RTRM.
5. LPC1 has tripped
5. Leak check, repair, evacuate, and recharge as necessary. Check
LPC1 operation.
Содержание Voyager RT-SVX17C-EN
Страница 8: ...8 Figure 1 Unit Dimensions for TC_ TE_ and YC_330 360 and 420 MBH Units Low Heat ...
Страница 9: ...9 Figure 1 continued Unit Dimensions for YC_330 360 and 420 MBH Units High Heat ...
Страница 10: ...10 Figure 1 continued Unit Dimensions for TC_ TE_ and YC_480 and 600 MBH Units Low High Heat ...
Страница 24: ...24 Figure 10 Typical FieldWiring Requirements for CV Control Options ...
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