The Cummins/Onan GSAA is an engine. It powers generator sets from Cummins/Onan. It holds 1.6 L (0.4 gal) of oil.
Also known as: Onan GSAA engine
| Oil capacity | 1.6 L |
|---|
How to read your Cummins/Onan engine serial & model number →
| Code | Meaning | Cause | Remedy |
|---|---|---|---|
| CODE 19 | Controller sensed governor actuator circuit open or shorted. | Have unit serviced by an authorized Cummins Onan dealer. | |
| 22 | GOVERNOR ACTUATOR OVERLOAD | Duration of operation at or near full duty−cycle beyond design limit | Reduce the number of connected loads especially loads that require higher starting current such as air conditioners. Check and service air filter as necessary. Have unit serviced by an authorized Cummins Onan dealer. |
| 27 | VOLTAGE SENSE LOST | Control unable to sense output voltage | Have unit serviced by an authorized Cummins Onan dealer. |
| 32 | LOW CRANKING SPEED SENSE | Controller sensed generator set cranking speed less than 180 rpm for greater than 3 seconds. | Clean and tighten positive (+) and negative (−) battery cable connections at the battery. Recharge or replace battery. Refer to the battery manufacturer’s recommendations. Verify engine oil viscosity is correct for the ambient temperature. If not, refill and replace engine oil with correct viscosity. Have unit serviced by an authorized Cummins Onan dealer. |
| 36 | GENERATOR SET STOPPED WITHOUT FAULT CONDITION | Generator stopped without command by controller. | Open any closed fuel valves. Secure spark plug leads to spark plugs. Check and service air filter as necessary. Replace spark plugs. Check for mechanical damage. |
| 45 | SPEED SENSE FAULT | Controller unable to sense quadrature frequency. | Have unit serviced by an authorized Cummins Onan dealer. |
| 46 | GENERATOR SET OVERLOAD | Current is at 100% of rated operation at design limit. | Reduce the number of connected loads especially loads that require higher starting current such as air conditioners. Check and service air filter as necessary. Have unit serviced by an authorized Cummins Onan dealer. |
| 2 | No AC Power - generator set Running, Status LED On Steady or Flashing | ||
| 12 | Overvoltage - Fault Code 12 | ||
| 13 | Undervoltage - Fault Code 13 | ||
| 14 | Overfrequency - Fault Code 14 | ||
| 15 | Underfrequency - Fault Code 15 | ||
| 19 | Governor Actuator shutdown - Fault Code 19 | ||
| 22 | Governor Actuator Overload - Fault Code 22 | ||
| 27 | Voltage Sense Lost - Fault Code 27 | ||
| 29 | High Battery Voltage - Fault Code 29 | ||
| 32 | Low Cranking Speed Sense - Fault Code 32 | ||
| 35 | Control Card Failure - Fault Code 35 | ||
| 36 | Generator Set Stopped Without Fault Condition - Fault Code 36 | ||
| 37 | Invalid Set Configuration - Fault Code 37 | ||
| 43 | Processor Fault - Fault Code 43 | ||
| 45 | Speed Sense Fault - Fault Code 45 |
| Symptom | Cause | Remedy |
|---|---|---|
| NO RESPONSE − STATUS INDICATOR LIGHT DEAD | Low/No battery voltage, poor battery connection, faulty battery, open harness connection, faulty start/stop switch, faulty LED | 1. Try generator set Start Switch if the remote display Start Switch does not respond, and vice versa 2. Clean and tighten positive (+) and negative (−) battery cable connections at the battery. 3. Recharge or replace battery. Refer to the battery manufacturer’s recommendations. |
| STARTING BATTERY RUNS DOWN | Marginal battery connections, battery, charging system, excessive cranking | 1. Clean and tighten positive (+) and negative (−) battery cable connections at the battery. 2. Recharge or replace battery. Refer to the battery manufacturer’s recommendations. 3. Have battery charger serviced by an authorized Cummins location. |
| STARTER ENGAGES − DISENGAGES | Cranking voltage dips below 6 VDC − Battery connections, battery, charging system, start/stop switches | 1. Clean and tighten positive (+) and negative (−) battery cable connections at the battery. 2. Recharge or replace battery. Refer to the battery manufacturer’s recommendations. 3. Have the battery charger serviced by an authorized Cummins Onan dealer. |
| NO AC POWER − GENERATOR SET RUNNING, STATUS LED ON STEADY OR FLASHING RAPIDLY | Circuit breakers tripped to OFF, due to short circuit or overloading. | 1. Reset or turn on generator set circuit breaker. 2. Reset or turn on circuit breaker in the distribution panel. 3. Reduce number of loads. 4. Have the circuits from the generator set and distribution panel verified by an authorized electrician. |
| GENERATOR SET CRANKS BUT DOES NOT START − NO FAULT CODE | Not holding start switch long enough to cause fault | 1. Check and record last fault code. 2. Crank generator set and hold switch until control stops cranking and displays fault code (approximately 30 seconds): troubleshoot fault code and reference last fault code recorded above if necessary. |
| GENERATOR SET RUNS BUT STOPS WHEN SWITCH IS RELEASED − NO FAULT CODE | Not holding start switch long enough to cause fault | 1. Check and record last fault code. 2. Start generator set and hold switch until control shuts down and displays fault code (approximately 30 seconds): troubleshoot fault code and reference last fault code recorded above if necessary. |
Fault codes and symptom→remedy steps extracted from this engine’s service/owner documentation; verify against the official manual before servicing.
Compiled from service & troubleshooting documentation across every generator set that uses the Cummins/Onan GSAA.
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Engine air filter element replacement | — | 300 hr | ||
| Oil filter | Engine oil filter replacement | — | 300 hr | ||
| Battery | Starting battery clean/check/replace | — | 150 hr | ||
| Oil | Engine oil level check, change | 1.6 liters | 0503-2151 | 300 hr | Amazon eBay |
| Spark plug | Spark plug replacement (2 per engine) | — | 450 hr |
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.
The Cummins/Onan GSAA engine has an oil capacity of 1.6 liters.
The Cummins/Onan GSAA powers 1 generator set(s), including Cummins/Onan GSAA.
The Cummins/Onan GSAA oil change interval is every 300 hours.
A commonly reported issue on generators using the Cummins/Onan GSAA is: Voltage Sense Lost - Fault Code 27.