CONTROLLER OPERATIONAL TESTS

For the Garland (US Range) 200(20) – 300(30) – 410(41)

–450(45) – 455(45+) – 470 – 4712 – 475 FAST convection oven controls.

200 Series Controller (Thermostat only)

Turn the oven on, the oven should heat to set temperature within 30 minutes. 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 the chart for other resistance readings. If the probe reads an open or short, replace the defective probe. Check the probe interconnect harness to make sure the circuit is good, connections etc.

The heat relay K1 should be energized when heating the oven and opened if it is not calling for heat.

The fan is not controlled by the controller.

300 Series Controller (Thermostat and relay board)

Turn the oven on, the oven should heat to set temperature within 30 minutes. 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 for other resistance readings. If the probe reads an open or short replace the defective probe. Check the probe interconnect harness to make sure the circuit is good, connections, etc.

The heat demand rely K1B should be energized then 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 (there is a low CR4 and a high fan CR30, 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-107-2001.

If the potentiometer does not adjust the temperature, check the potentiometer. Pot is a 0 to 10.25K Ohm pot.

410 Series Controller

(Thermostat, display and relay board)

Turn the oven on, the 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 K1F 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 upper door switch if the heat does not activate.

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-107-2001 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 it does not, change the encoder.

450 Series Controller

(Thermostat, display and relay board)

Follow the steps for the 410 controller.

If the display shows a temperature only and the function keys do not operate, check to see if the hold LED is active. Press cancel to deactivate the hold feature and return to the idle mode.

455 Series Controller

(Thermostat, display and relay board)

Follow the steps for the 410 controller.

If the display shows a temperature only and the function keys do not operate, check to see if the hold or core temp LED is active. Press cancel to deactivate the hold feature and return to the idle mode or remove the core probe to return to idle mode.

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

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Garland 200 service manual Controller Operational Tests, Series Controller Thermostat only
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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.

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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.
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