470 Series Controller

(Thermostat, display and relay board)

Turn the oven on, oven should heat to set temperature within 30 minutes. Press the temperature icon and the temperature can be viewed above 100 degrees F. If the oven does not heat, ohm out the probe, at room temperature the probe should read about 1,000 ohms. Ohm the probe at the faston connection. See chart under Probes in section four for other resistance readings. If the probe reads an open or short, replace the defective probe.

The heat demand relay K1B should be energized when heating the oven and opened if it is not calling for heat. Look at the heat LED CR1 on the relay board, the LED will be lit when the controller calls for heat. Check the door switch if the heat does not activate. Upper door switch is for heat.

The fan can switch from low to high speed. Look at the fan LED on the relay board (CR3 LED for high and CR4 for low speed), the LED will be lit when the controller calls for either fan. If the operator cannot switch from one fan speed to another, check the keypad. If the light switched on the display from one fan speed to another but the fan did not change speeds, check the relay board. If the display switched and the fan went off, check the fan itself.

If the keypad does not respond, check the keypad. As outlined in bulletin B-107-2201

If the encoder does not adjust the temperature check, from idle press the set function key and adjust the encoder, the display should change accordingly. If not, change the encoder.

471 Series Controller

(Custom configuration of the 470 series)

Follow the steps for the 470 controller.

475 Series Controller

(470 version controller with profiles)

Follow the steps for the 470 controller.

CONTROLLER FAULT FINDING

Unless otherwise stated the faults and trouble shooting are the same for all controllers.

DISPLAY FAULT

Does not apply to 200 and 300 series.

Display does not light up

Check the incoming voltage to the oven

Check for 24 volts AC voltage on pins 1 and 3 of the 15-pin connector

If both check out fine the control board is defective

Display does not change..

Is the colon flashing? If yes, the controller is in hours and minutes not minutes and seconds. Enter programming to change the time. If no, disconnect the power for 2 minutes and reapply power and try to change the time.

If the display still does not change the control board is defective.

Display reads…..

"Auto" The controller is in auto cool. The fan will continue to operate until the cavity temperature cools to below 150°F. Then the control will turn off.

"Cool" The controller is in cool. This will happen if the cool down key is depressed and the door is opened to the first door switch only.

Part # MCOSM06 Rev 1 (11/03/08)

Page 61

Page 61
Image 61
Garland 200 service manual Controller Fault Finding

200 specifications

Garland 200 is an innovative and versatile piece of equipment that has made a significant impact in various industries due to its advanced features and technologies. Designed for efficiency and performance, the Garland 200 stands out with its unique combination of high-quality materials and cutting-edge engineering.

One of the primary characteristics of the Garland 200 is its robust construction. Built to withstand rigorous demands, it employs a heavy-duty frame that ensures durability and longevity. This makes it an ideal choice for both indoor and outdoor applications, as it can endure harsh environmental conditions while maintaining optimal performance.

The Garland 200 features an intuitive control interface, which enhances user experience by making operations straightforward and efficient. The user-friendly design allows operators to quickly adapt to the equipment, minimizing the learning curve and ensuring a smooth workflow. With its easy-to-navigate controls, users can make adjustments on-the-fly, improving overall productivity.

Incorporating state-of-the-art technologies, the Garland 200 is equipped with advanced sensors that monitor performance in real-time. This feature not only enhances the safety of operations but also allows for proactive maintenance, reducing downtime and extending the equipment's lifespan. Users benefit from detailed analytical data that can lead to informed decision-making, optimizing productivity.

Additionally, the Garland 200 is designed with energy efficiency in mind. It employs energy-saving technologies that reduce consumption while maintaining superior performance levels. This commitment to sustainability not only lowers operational costs but also aligns with modern environmental standards.

Another notable feature is its versatility. The Garland 200 is compatible with a range of attachments and accessories, allowing it to adapt to various tasks and requirements easily. This flexibility makes it a favorite among professionals in landscaping, construction, and other demanding fields.

Overall, the Garland 200 has become a reliable choice for those seeking a powerful and efficient solution for their operational needs. With its combination of durability, advanced technology, user-friendly features, and energy efficiency, it sets a new standard in its category. As industries continue to evolve, the Garland 200 stands ready to meet the challenges of tomorrow.