Cummins Onan P9500df
7500 W, dual-fuel
Firman H07553
Generator. Specs from the manufacturer page (checked ).
The Firman H07553 is a dual-fuel inverter generator rated at 7500 W running and 9400 W starting on gasoline, and 6750 W running and 8450 W starting on LPG. It has a 439cc engine, an 8-gallon tank, and 120/240 volt outlets, and weighs 212 lbs.
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Running
7500W
Peak / surge
9400W
Fuel
dual-fuel
Weight
96.2kg
Warranty
4yr
Key features
- 439cc dual-fuel engine with 7500W running and 9400W starting on gasoline, 6750W running and 8450W starting on LPG
- Recoil start and electric start
- Low oil shut off
- 8-gallon tank with fuel gauge, up to 12 hours run time at 25% load
- Outlets: 5-20R 120V 20A duplex GFCI, L5-30R 120V 30A twistlock, L14-30R 120V/240V 30A twistlock, 14-50R 120V/240V 50A
- 75dB at 3/4 load
- 4-year warranty
Specifications
| Running watts | 7500 W |
|---|---|
| Peak / surge | 9400 W |
| Fuel | dual-fuel |
| Tank | 30.3 L (8.0 gal) |
| AC output voltage | 120/240 volts |
| Weight | 96.2 kg (212.1 lb) |
| Warranty | 4 years |
From the Firman page. Values the manufacturer does not publish are left out.
What is in the box
- 25 ft 7.6 m power cord L14-30P to 4x5-20R
- Cover
- Hose holder
- Engine oil
- 10" never flat wheels
- Padded U-shaped handle
- Oil funnel
- 5.5 ft LPG hose
- Tool kit with wrench
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Connection and wiring
Follow the diagrams in the Firman manual. Connecting to a home panel needs a transfer switch or interlock and a licensed electrician.
- Wiring diagram, manual page 2 →
- Wiring diagram, manual page 37 →
- Wiring diagram, manual page 38 →
- Wiring diagram, manual page 39 →
- Wiring diagram, manual page 40 →
Error codes and troubleshooting
| Code | Meaning | What to do | Manual page |
|---|---|---|---|
| Circuit Breakers | The receptacles are protected by an AC circuit protector that trips if the generator is overloaded or an external short circuit occurs. | Disconnect all electrical loads and determine the cause before using the generator again. If overloading caused the trip, reduce the load. Reset by pressing the protector button. Continuous tripping may damage the generator or equipment. | 8 |
| Oil Warning Indicator Light | Indicates the oil has fallen below the minimum level. The engine stops automatically and will not start until the proper amount of oil is in the crankcase. | Check the oil level when this light turns on. Add the proper amount of engine oil to the crankcase before attempting to start the engine. | 8 |
| Overload Indicator Light | Connected devices have exceeded the generator's wattage or amperage capacity, or a power surge occurred. The AC Power light goes off, the engine keeps running, and power to the receptacles is cut. | Keep the total power drawn from all receptacles within the nameplate rating. | 8 |
| Circuit Breaker | The receptacles are protected by an AC circuit protector that trips if the generator is overloaded or an external short circuit occurs. | Disconnect all electrical loads and find the cause before using the generator again. If overloading caused the trip, reduce the load. Reset by pressing the button on the protector. Continuous tripping may damage the generator or equipment. | 9 |
| Output Ready | Stays on during normal operation. Turns off when the generator is overloaded. | — | 9 |
| AC Reset | The inverter has entered a protective state and AC output is interrupted. | Press the AC Reset Button to restore the output. | 12 |
6 of 13 codes. From the Firman manual. All 13 WH03242 / T09371 / H07553 / W03083 codes →
FAQ
Can the Firman H07553 start a sump pump or well pump?
Starting surge matters more than running watts: this unit is rated 9400 W peak. That covers a typical 1/2 HP sump pump (about 2150 W to start). Use the calculator with your exact pump.