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225
TROUBLESHOOTING GUIDE
Table 174 shows potential unit issues and possible solutions. This
table is meant only as a guide, and is not exhaustive in issues or
solutions.
Table 174 — Troubleshooting
LEGEND
SYMPTOM
POSSIBLE CAUSE
POSSIBLE REMEDY
Unit Does Not Run
Check for power to unit
• Check overcurrent protection device.
• Check non-fused disconnect (if equipped).
• Restore power to unit.
• Check Active Capacity Override, CAPA_override.
Wrong or incorrect unit
configuration
Check unit configuration.
Active alarm
Check Alarm status. See the Alarms and Alerts section and follow troubleshooting instructions.
Active operating mode
Check for Operating Modes. See the Operating Modes section and follow troubleshooting instruc-
tions.
High pressure switch (HPS) open
• Recheck high pressure switch.
• Check HPS wiring in compressor VFD.
VFD Enable
• Check VFD enable output from SIOB J6-DO04 for 24VAC.
• Check wiring in compressor VFD at terminals 13 and 27.
Unit Operates Too Long or
Continuously
Low refrigerant charge
Check for leak and add refrigerant.
Air in chilled water loop
Purge water loop.
Non-condensables in
refrigerant circuit
Remove refrigerant and recharge.
Inoperative EXV
• Check EXV, clean or replace.
• Check EXV cable, replace if necessary.
• Check EXV board for output signal.
Load too high
Unit may be undersized for application.
Circuit Does Not Run
Active alarm
Check Alarm status. See the Alarms and Alerts section and follow troubleshooting instructions.
Check Active Capacity Override, CAPA_override.
Active operating mode
Check for Operating Modes. See the Operating Modes section and follow troubleshooting instruc-
tions.Check Active Capacity Override, CAPA_override.
Circuit Does Not Load
Active alarm
Check Alarm status. See the Alarms and Alerts section and follow troubleshooting instructions.
Active operating mode
Check for Operating Modes. See the Operating Modes section and follow troubleshooting instruc-
tions.
Low saturated suction
temperature
See Capacity Control Overrides #23 and #24.
High circuit suction superheat
The circuit capacity is not allowed to increase if circuit superheat is greater than 36°F (20°C).
• Check for faulty suction transducer or wiring.
• Check for restriction in liquid line (filter drier, service valve, etc.).
• Check EXV operation.
• Check for proper refrigerant charge.
Low suction superheat
The circuit capacity is not allowed to increase if circuit superheat is less than 18°F (10°C).
• Check for faulty suction transducer or wiring.
• Check for restriction in liquid line (filter drier, service valve, etc.).
• Check EXV operation.
• Check for proper refrigerant charge.
Low discharge superheat
The circuit is not allowed to increase if discharge superheat is below 16.2°F (–8.8°C).
• Check for faulty suction transducer or wiring.
• Check for restriction in liquid line (filter drier, service valve, etc.).
• Check EXV operation.
• Check for proper refrigerant charge.
Compressor or Fans Do Not
Run
Active alarm
Check Alarm status. See the Alarms and Alerts section and follow troubleshooting instructions.
Active operating mode
Check for Operating Modes. See the Operating Modes section and follow troubleshooting instructions.
VFD fuses blown
Check compressor and fan VFD fuses and replace if necessary
Chilled Water Pump is ON, but
the Machine is OFF
Evaporator freeze protection
Chilled water loop temperature too low. Check evaporator heater.
EXV
—
Electronic Expansion Valve
HPS
—
High Pressure Switch
VFD
—
Variable Frequency Drive
Summary of Contents for AquaForce 30XV140
Page 79: ...79 Fig 76 VFD Communication Wiring Compressor A B Fan VFD A1 A2 B1 B2...
Page 228: ...228 Fig 90 30XV Typical Field Wiring Schematic cont...
Page 229: ...229 Fig 91 30XV Standard Tier 140 275 All Voltages Power Schematic NOTE See Legend on page 226...
Page 230: ...230 Fig 92 30XV Standard Tier 300 325 All Voltages Power Schematic NOTE See Legend on page 226...
Page 240: ...240 Fig 99 30XV Communication Wiring...
Page 241: ...241 Fig 100 30XV 115V Control Wiring All Tonnages All Voltages...
Page 242: ...242 Fig 101 30XV 24V Control Wiring 30XV140 325 All Voltages...
Page 243: ...243 Fig 101 30XV 24V Control Wiring 30XV140 325 All Voltages cont...
Page 244: ...244 Fig 102 30XV 24V Control Wiring 30XV350 500 All Voltages...
Page 245: ...245 Fig 102 30XV 24V Control Wiring 30XV350 500 All Voltages cont...
Page 246: ...246 Fig 103 Component Arrangement Diagram for 30XV140 325...
Page 247: ...247 Fig 103 Component Arrangement Diagram for 30XV140 325 cont...
Page 248: ...248 Fig 104 Component Arrangement Diagram for 30XV350 500...
Page 337: ...337 APPENDIX J FACTORY SUPPLIED PUMPS cont Fig L System Information...
Page 338: ...338 APPENDIX J FACTORY SUPPLIED PUMPS cont Fig M Unit and Language Settings...
Page 341: ...341 APPENDIX J FACTORY SUPPLIED PUMPS cont Fig P Data Input 2...
Page 342: ...342 APPENDIX J FACTORY SUPPLIED PUMPS cont Fig Q Data Input 3...
Page 347: ...347 APPENDIX J FACTORY SUPPLIED PUMPS cont Fig U Pump Wiring Diagram...