Dometic Harrier Inverter
Official technical documentation and workshop diagnostics for Harrier Inverter.
Technical Specifications
Master Troubleshooting & Diagnostics Matrix
| Error Code / Indicator | Symptom / Meaning | Step-by-Step DIY Fix | Suggested Actions |
|---|---|---|---|
N/A | Roof air conditioner constantly switches itself off Possible Cause: Icing sensor has tripped due to outer temperature being too low or all air nozzles being closed | Ensure outer temperature is within operating limits and open air nozzles. | DIY Safe |
N/A | Not cooling well Possible Cause: The roof air conditioner is not set to cooling mode | Set the roof air conditioner to cooling. | DIY Safe |
N/A | Not cooling well Possible Cause: Ambient temperature is above 52 °C | Wait for ambient temperature to drop below 52 °C as unit is only designed up to this limit. | DIY Safe |
N/A | Not cooling well Possible Cause: Temperature set is higher than the room temperature | Select a lower temperature. | DIY Safe |
N/A | Not cooling well Possible Cause: Ambient temperature is below 16 °C | Unit does not cool below 16 °C outside temperature. | DIY Safe |
N/A | Not cooling well Possible Cause: Temperature sensor, evaporator fan, or condenser fan is defective | Contact an authorised service agent or Dometic. | Professional Intervention Required |
N/A | Not heating well Possible Cause: The roof air conditioner is not set to heating mode | Set the roof air conditioner to heating. | DIY Safe |
N/A | Not heating well Possible Cause: Ambient temperature is above -2 °C or set temperature is lower than room temperature | Select a higher temperature; note that heating operates at ambient temperatures above -2 °C. | DIY Safe |
N/A | Not heating well Possible Cause: Defective temperature sensor or damaged fans | Contact an authorised service agent or Dometic. | Professional Intervention Required |
N/A | Low air output Possible Cause: Air intake grilles are blocked or obstructed | Remove any leaves and other dirt from the ventilation grilles of the roof air conditioner. | DIY Safe |
N/A | Low air output Possible Cause: Blower is defective | Contact an authorised service agent or Dometic. | Professional Intervention Required |
N/A | Water enters the vehicle Possible Cause: Condensation water drainage openings are clogged up | Clean the drainage openings for condensation water. | DIY Safe |
N/A | Water enters the vehicle Possible Cause: Seals are damaged | Contact an authorised service agent or Dometic. | Professional Intervention Required |
N/A | Roof air conditioner does not switch on Possible Cause: No supply voltage connected, voltage is too low (under 200 V), voltage converter defective, electrical fuse too low | Check the power supply and electrical fuse; contact service agent if voltage converter or sensors are defective. | DIY Check / Tech Fallback |
N/A | Remote control does not register Possible Cause: Remote control is not pointing towards the ADB display or batteries need replacing | Point the remote control towards the ADB display or replace batteries with 2 x type AAA. | DIY Safe |
N/A | Rooftop air conditioner keeps shutting off automatically Possible Cause: Outside temperature is too low or ice sensor failure | Check ambient conditions or contact an authorized service agent / Dometic | DIY Check / Tech Fallback |
N/A | Cooling does not work properly Possible Cause: Air conditioner not set to cooling mode, set temperature higher than room temperature, or faulty temperature sensor / evaporator fan / condenser fan | Set air conditioner to cooling mode, select a lower temperature, or contact an authorized service agent / Dometic | DIY Check / Tech Fallback |
N/A | Heating does not work properly Possible Cause: Air conditioner not set to heating mode, set temperature lower than room temperature, or faulty temperature sensor / evaporator fan / condenser fan | Set air conditioner to heating mode, select a higher temperature, or contact an authorized service agent / Dometic | DIY Check / Tech Fallback |
N/A | Water leaks into the vehicle Possible Cause: Condensation drain holes blocked or damaged seals | Clean condensation drain holes or contact an authorized service agent / Dometic | DIY Check / Tech Fallback |
N/A | Rooftop air conditioner does not work Possible Cause: Power supply disconnected, voltage incorrect, voltage converter faulty, or power source fuse too low | Check electrical current/power supply, check power source fuse, or contact an authorized service agent / Dometic | DIY Check / Tech Fallback |
N/A | Rooftop air conditioner does not stop running Possible Cause: Faulty temperature sensor or power source fuse rating issue | Contact an authorized service agent / Dometic or check power source fuse | DIY Check / Tech Fallback |
N/A | Remote control does not work Possible Cause: Remote control not pointed toward the air distribution box screen, or low remote control batteries | Aim remote control toward the air distribution box screen or replace the batteries | DIY Safe |
N/A | Rooftop air conditioner shuts down continuously Possible Cause: Outside temperature is too low or frost sensor malfunction | Check ambient conditions or contact an authorized service agent | DIY Check / Tech Fallback |
N/A | Cooling does not occur properly Possible Cause: Unit not set to cooling mode, set temperature is higher than room temperature, or faulty temperature sensor / evaporator fan / condenser fan | Set unit to cooling mode, select a lower temperature, or contact an authorized service agent for sensor and fan checks | DIY Check / Tech Fallback |
N/A | Heating does not occur properly Possible Cause: Unit not set to heating mode, set temperature is lower than room temperature, or faulty temperature sensor / evaporator fan / condenser fan | Set unit to heating mode, select a higher temperature, or contact an authorized service agent | DIY Check / Tech Fallback |
N/A | Air output is low Possible Cause: Intake grilles blocked or dirty, or blower unit faulty | Remove leaves and other debris from ventilation grilles; contact an authorized service agent if blower unit is faulty | DIY Check / Tech Fallback |
N/A | Rooftop air conditioner does not operate Possible Cause: Power supply issue, damaged voltage converter, blown fuse, or faulty temperature sensor | Check power supply voltage and fuses, verify master supply ratings, or contact an authorized service agent | DIY Check / Tech Fallback |
Frequently Asked Questions
Q: MY ROOFTOP UNIT HAS THE ELECTRIC HEAT STRIP OPTION (NON-HEAT PUMP ELECTRIC HEAT OPTION), BUT WHEN IT GETS COLDER OUTSIDE IT DOESN’T SEEM TO MAINTAIN THE TEMPERATURE. WHAT SHOULD I DO?
Electric heat strips are designed to take the chill out of the air inside your motorhome, but they are not intended to be the primary heat source for cold weather camping. When outdoor temperatures drop significantly, the heat loss of the motorhome typically exceeds the capacity of a standard electric heat strip.
Q: WHAT ARE THE BENEFITS OF A MOTORHOME AIR CONDITIONER?
An motorhome air conditioner helps maintain a comfortable indoor climate, reduces humidity levels inside the vehicle, and filters out dust and pollen, creating a more pleasant and healthy living space while traveling or camping.
Q: WHAT IS THE IDEAL AIR CONDITIONING TEMPERATURE?
The ideal indoor air conditioning temperature for an motorhome is generally between 70°F and 72°F (21°C to 22°C), balancing comfort and energy efficiency.
Q: WHAT MOTORHOME AC DO I NEED IN WARM LOCATIONS?
For extremely warm locations or larger motorhomes, a high-capacity rooftop air conditioner (such as a 13,500 BTU or 15,000 BTU unit) or a dual AC setup is recommended to adequately cool the space.
Q: HOW DOES MOTORHOME AIR CONDITIONING WORK?
Motorhome air conditioning works on the same principle as a standard home AC unit. It uses a refrigeration cycle involving a compressor, condenser, expansion valve, and evaporator to absorb heat from the interior air and exhaust it outside, while blowing cooled air back into the motorhome.
Q: HOW TO RUN MY MOTORHOME AC WITH A GENERATOR?
To run your motorhome air conditioner with a generator, ensure the generator has sufficient running and starting wattage (surge wattage) to handle the compressor's startup load—typically a minimum of 2,000 to 3,000 watts depending on the AC unit size. Always start the generator and let it stabilize before turning on the air conditioner.
Q: HOW TO RUN MY MOTORHOME AIR CONDITIONER ON THE CAMPSITE?
To run your motorhome air conditioner at a campsite, connect your motorhome to an appropriate power pedestal (usually 30-amp or 50-amp service) matching your motorhomes electrical system requirements. Ensure other high-draw appliances are managed to avoid tripping the campsite breaker.