Check your voltage meter, so it measures correctly, probably generate your UPS is not pure sine wave, but a modified sine, then the simple measuring devices to display the wrong value.
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Definition of Diagnostic Trouble Code P1041
Saab:
Injector Cylinder 4 Shorting To Ground
There is no definition for DTC P1047
CodeDescription P1192 Inlet Air Temp. Circuit Low P1193 Inlet Air Temp. Circuit High P1195 1/1 O2 Sensor Slow During Catalyst Monitor P1196 2/1 O2 Sensor Slow During Catalyst Monitor P1197 1/2 O2 Sensor Slow During Catalyst Monitor P1198 Radiator Temperature Sensor Volts Too High P1199 Radiator Temperature Sensor Volts Too Low P1281 Engine Is Cold Too Long P1282 Fuel Pump Relay Control Circuit P1283 Idle Select Signal Invalid P1284 Fuel Injection Pump Battery Voltage Out Of Range P1285 Fuel Injection Pump Controller Always On P1286 Accelerator Pedal Position Sensor Supply Voltage Too High P1287 Fuel Injection Pump Controller Supply Voltage Low P1288 Intake Manifold Short Runner Solenoid Circuit P1289 Manifold Tune Valve Solenoid Circuit P1290 CNG Fuel Pressure Too High P1291 No Temp Rise Seen From Fuel Heaters P1292 CNG Pressure Sensor Voltage Too High P1293 CNG Pressure Sensor Voltage Too Low P1294 Target Idle Not Reached P1295 No 5 Volts To TP Sensor P1296 No 5 Volts To MAP Sensor P1297 No Change in MAP From Start To Run P1298 Lean Operation At wide Open Throttle P1299 Vacuum Leak Found (IAC Fully Seated) P1388 Auto Shutdown (ASD) Relay Control Circuit P1389 No Auto Shutdown (ASD) Relay Output Voltage At PCM P1390 Timing Belt Skipped One Tooth or More P1391 Intermittent Loss of CMP or CKP P1398 Mis-Fire Adapter Numerator at Limit P1399 Wait To Start Lamp Circuit P1403 No 5 Volts To EGR Sensor P1475 Aux. 5 Volt Output Too High P1476 Too Little Secondary Air P1477 Too Much Secondary Air P1478 Battery Temp Sensor Volts Out of Limit P1479 Transmission Fan Relay Circuit P1480 PCV Solenoid Valve P1482 Catalyst Temperature Sensor Circuit Shorted Low P1483 Catalyst Temperature Sensor Circuit Shorted High P1484 Catalytic Converter Overheat Detected P1485 Air Injection Solenoid Circuit P1486 Evap Leak Monitor Pinched Hose P1487 Hi Speed Rad Fan CTRL Relay Circuit P1488 Auxiliary 5 Volt Supply Output Too Low P1489 High Speed Fan CTRL Relay Circuit P1490 Low Speed Fan CTRL Relay Circuit P1491 Rad Fan Control Relay Circuit P1492 Battery Temperature Sensor Voltage Too High P1493 Battery Temperature Sensor Voltage Too Low P1494 Leak Detection Pump Switch or Mechanical Fault P1495 Leak Detection Pump Solenoid Circuit P1496 5 Volt Supply Output Too Low P1498 High speed Rad Fan Ground CTRL Rly Circuit P1594 Charging System Voltage Too High P1595 Speed Control Solenoid Circuits P1596 Speed Control Switch Always High P1597 Speed Control Switch Always Low P1598 A/C Pressure Sensor Volts Too High P1599 A/C Pressure Sensor Volts Too Low P1602 PCM Not Programmed P1680 Clutch Released Switch Circuit P1681 No I/P Cluster CCD/J1850 Messages Received P1682 Charging System Voltage Too Low P1683 Speed Control Power Relay Or Speed Control 12 Volt Driver Circuit P1684 Battery Disconnected Within Last 50 Starts P1685 Skim Invalid Key P1686 No SKIM Bus Message Received P1687 No Cluster Bus Message P1688 Internal Fuel Injection Pump Controller Failure P1689 No Communication Between ECM & Injection Pump Module P1690 Fuel injection pump CKP Sensor Does Not Agree With ECM CKP Sensor P1691 Fuel Injection Pump Controller Calibration Failure P1693 DTC Detected In ECM Or PCM P1694 No CCD Messages Received From ECM P1695 No CCD/J185O Message From BCM P1696 PCM Failure EEPROM Write Denied P1697 PCM Failure SRI Mile Not Stored P1698 No CCD Messages Received From PCM P1719 Skip Shift Solenoid Circuit P1740 TCC Or OD Solenoid Performance P1756 Governor Pressure Not Equal To Target At 15?20 PSI P1757 Governor Pressure Above 3 PSI When Request Is 0 PSI P1762 Governor Pressure Sensor Offset Improper Voltage P1763 Governor Pressure Sensor Voltage Too High P1764 Governor Pressure Sensor Voltage Too Low P1765 Trans 12 Volt Supply Relay Control Circuit P1899 Park/Neutral Position Switch Stuck In Park or In Gear
Are you using a true-RMS voltmeter to measure the DR's output? The DR's output is modified sine wave, and a cheap average reading AC voltmeter will give you a reading of 90 volts or so. Alternately, if you have an oscilloscope, you can verify that the modified sine wave is around 170V peak to peak. It should alternate in segments of -170, 0, +170, 0... The duty cycle and peak voltages will vary with the inverter load.
- Tom, Sun Electronics International, Miami, FL
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