70,000 Btu/Hr H.S.I. Series

PORTABLE FORCED AIR HEATERS

TROUBLESHOOTING

Note: For additional help, visit DESA International’s technical service web site at www.desatech.com.

WARNING: Never service heater while it is plugged in, operating, or hot. Severe burns and electrical shock can occur.

FAULT CONDITION

POSSIBLE CAUSE

REMEDY

Motor does not start five seconds after heater

1. No power to heater

1. Check circuit breaker in electrical panel

is plugged in

 

 

 

 

WARNING: High voltage!

 

 

 

 

 

 

 

 

2.Bad electrical connection between mo- tor and ignition control assembly or ig- nition control assembly and power cord

3.Blown fuse on ignition control assembly

4.Binding pump rotor

5.Defective ignition control assembly

6.Defective motor

2.Check all electrical connections. See Wiring Diagram, page 11

3.See Ignition Control Assembly, page 8

4.If fan does not turn freely, see Pump Rotor, page 10

5.Replace ignition control assembly

6.Replace motor

Motor starts and runs but heater does not ignite

1.No fuel in tank

2.Pump pressure incorrect

3.Dirty fuel filter

4.Obstruction in nozzle

5.Water in fuel tank

1.Fill tank with kerosene

2.See Pump Pressure Adjustment, page 7

3.See Fuel Filter, page 8

4.See Nozzle Assembly, page 9

5.Drain and flush fuel tank with clean kerosene. See Storing, Transporting, or Shipping, page 5

WARNING: High voltage!

6.

Bad electrical connection between igni-

6.

Check electrical connections. See Wir-

 

tor and ignition control assembly

 

ing Diagram, page 11

7.

Defective ignitor

7.

Replace ignitor, see page 8

8.

Defective ignition control assembly

8.

Replace ignition control assembly

Heater ignites but ignition control assembly shuts heater off after a short period of time

1.Pump pressure incorrect

2.Dirty air intake, air output, and/or lint filter

3.Dirty fuel filter

4.Obstruction in nozzle

5.Photocell assembly not properly in- stalled (not seeing the flame)

1.See Pump Pressure Adjustment, page 7

2.See Air Output, Air Intake, and Lint Fil- ters, page 7

3.See Fuel Filter, page 8

4.See Nozzle Assembly, page 9

5.Make sure photocell boot is properly seated in bracket

WARNING: High voltage!

6.

Dirty photocell lens

6.

Clean photocell lens

7.

Bad electrical connection between pho-

7.

Check electrical connections. See Wir-

 

tocell and ignition control assembly

 

ing Diagram, page 11

8.

Defective photocell

8.

Replace photocell

9.

Defective ignition control assembly

9.

Replace ignition control assembly

www.desatech.com

6

103685

Page 6
Image 6
Desa B70D, R70D owner manual Troubleshooting, Fault Condition Possible Cause Remedy

R70D, B70D specifications

Desa B70D and R70D are prominent models within the advanced range of digital printing solutions offered in the contemporary market. These printers are designed to meet the diverse requirements of businesses and individual users who demand high-quality prints with exceptional efficiency.

One of the main features of the Desa B70D is its impressive print resolution, which can reach up to 1200 x 1200 DPI. This high resolution ensures that every detail is captured crisp and clear, making it ideal for producing professional-grade documents, brochures, and marketing materials. The R70D model complements this with its enhanced color reproduction capabilities, allowing for vibrant prints that stand out in any setting.

Both models incorporate cutting-edge technology to streamline the printing process. They support automatic duplex printing, significantly reducing paper consumption and costs, as well as minimizing environmental impact. This feature is particularly beneficial for businesses looking to promote sustainability while maintaining productivity.

Another key characteristic of the Desa B70D and R70D is their robust and reliable performance. Equipped with high-capacity ink systems, these printers can handle large printing volumes with minimal maintenance. This efficiency translates to less downtime, making them suitable for environments where time and productivity are of the essence.

User-friendly interfaces are also a defining feature of these printers. They come with intuitive control panels and easy navigation systems, making them accessible even for those with limited technical expertise. Additionally, connectivity options such as Wi-Fi, Ethernet, and mobile printing capabilities ensure that users can print easily from various devices, enhancing workflow efficiency.

In conclusion, the Desa B70D and R70D represent advanced solutions in the digital printing landscape. Their combination of high-resolution output, sustainable features, and user-friendly functionality makes them an excellent choice for businesses and individuals alike. As technology continues to evolve, these models are well-equipped to meet the future demands of printing. Whether you require sharp text documents or vibrant visuals, these printers deliver performance that stands out in today’s competitive market. Their reliability and efficiency make them an invaluable asset to any printing operation, thereby establishing a strong foothold in the realm of digital printing technology.