Comprehensive Guide: How To Operate All Systems In A 1997 Rexhall Aerbus

Operating a 1997 Rexhall Aerbus requires a methodical transition between the 12V DC auxiliary battery systems and the 120V AC shore power or onboard generator infrastructure. Mastery of this motorhome depends on correctly managing the battery disconnect switch, the manual propane valve protocols, and the hydraulic leveling interface to ensure safety and system longevity.

Foundation and Pre-Operation Configuration

Before initiating power or deploying living amenities, you must establish a mechanical and electrical baseline. The 1997 Rexhall Aerbus is built on a Ford or Chevrolet chassis, meaning engine-specific checks—such as oil levels, transmission fluid, and coolant integrity—must take precedence over house systems.

• Essential Gear and Prerequisites:
• Digital multimeter for verifying voltage at the converter and battery terminals.
• Standard 30-amp shore power cable (check for burnt contacts on the male end).
• Pressure-regulated water hose (set to 40-50 PSI) and a white potable water-rated hose.
• Knowledge of the converter/inverter toggle states and the location of the master battery disconnect switch, usually hidden near the entry steps or battery compartment.
• Estimated Setup Duration: 30 to 45 minutes for a full system initialization.
• Budget: Minimal, assuming functional hardware; maintenance supplies such as dielectric grease and corrosion inhibitors remain under 50 dollars.

Operational Workflow for House and Chassis Integration

Step 1: Initiating DC Power and Battery Management

Locate the battery disconnect switch, often a rocker switch near the entry door. Engaging this connects the house batteries to the DC distribution panel. In a 1997 model, these batteries are typically deep-cycle lead-acid units. If the coach has been sitting, ensure the chassis battery and house batteries are at least 12.4 volts; anything lower indicates a need for a deep charge cycle.

Step 2: Shore Power and Generator Synchronization

When connecting to shore power, always ensure the main AC breaker in the interior power distribution panel is in the Off position before plugging the 30-amp cord into the pedestal. Once connected, flip the main breaker to On. To operate the generator, ensure the main breakers on the generator itself are engaged, then prime the fuel pump by holding the rocker switch in the Stop/Prime position for 10-15 seconds before cranking.

Warning: Never attempt to start the generator while connected to shore power if your transfer switch is malfunctioning, as this can result in catastrophic damage to the converter or connected appliances.

Step 3: Managing the Propane and Water Systems

The 1997 Rexhall Aerbus relies on propane for the furnace, refrigerator, and water heater. Slowly open the valve on the propane tank to prevent the excess flow safety device from tripping. Purge the air from the lines by lighting a burner on the stovetop. Once the flame is steady, proceed to ignite the water heater and refrigerator. For the water system, engage the 12V water pump switch only after filling the fresh water tank or connecting to a pressurized city water source; running the pump dry will destroy the internal diaphragm.

Step 4: Hydraulic Leveling and Slide-Out Deployment

If your unit is equipped with hydraulic levelers, engage the parking brake and place the transmission in Neutral. Leveling must occur before slide-out deployment to prevent binding or structural stress on the slide-out seals. Ensure the coach is on level ground, extend the levelers to touch the surface, and adjust until the spirit level indicates equilibrium. Once stable, extend the slide-out, keeping a watchful eye on the rubber weather stripping to ensure it is not pinched.

Technical Specifications and Component Parameters

The following table outlines the operational thresholds for the core systems found in the 1997 Rexhall Aerbus. Adhering to these figures is critical for preventing system failure.

Troubleshooting Common Operational Failures

Managing a vehicle of this age requires a proactive approach to common mechanical and electrical interruptions.

• AC Power Inactive despite Shore Connection:
  
  
  • Root Cause: Tripped GFCI outlet or corroded transfer switch contacts.
  • Actionable Fix: Reset the GFCI outlet located in the bathroom or near the galley, then inspect the transfer switch box for burnt wiring or loose connections.
• Refrigerator Fails to Cool on Propane:
  
  
  • Root Cause: Soot buildup in the burner tube or low propane pressure.
  • Actionable Fix: Use compressed air to clean the burner orifice and flue tube; ensure the propane regulator is delivering a consistent 11 inches of water column pressure.
• Water Pump Runs Continuously without Water Flow:
  
  
  • Root Cause: Air leak in the suction line or a failed check valve.
  • Actionable Fix: Inspect all hose clamps between the water tank and the pump for tightness; replace the pump head check valve if backflow persists.

Frequently Asked Questions

How do I switch the refrigerator between propane and electric modes?

The 1997 models typically utilize an Automatic Energy Selector (AES) system. Toggle the control panel to "Auto," which prioritizes 120V AC power when plugged in and automatically switches to propane if shore power is disconnected.

Why does my water heater emit a humming sound when on electric?

This is typically the element calcifying due to hard water deposits. Flush the water heater tank using a wand tool and vinegar solution to remove sediment buildup that creates noise and heat resistance.

Is it safe to leave the battery disconnect engaged during storage?

If the vehicle is stored without shore power, the disconnect must be off to prevent parasitic draw from the carbon monoxide detector and other hardwired items. If stored for more than two weeks, a trickle charger is recommended to prevent sulfation.

What is the purpose of the battery isolation solenoid?

The solenoid allows the engine alternator to charge both the chassis and house batteries while driving. If your house batteries are not charging while the engine is running, the solenoid is likely fused or the activation circuit has failed.

Protect Your Investment with Routine Maintenance

Regular inspection of the roof seals and plumbing connections is the single most effective way to extend the lifespan of your 1997 Rexhall Aerbus. Consult a certified RV technician annually to verify the integrity of your propane and electrical infrastructure to ensure every journey remains worry-free.