ELECTRONIC CONTROL SEQUENCE OF OPERATION

MODE CONTROL

The mode control pad(s) allow the selection of the operating modes of the unit.

There is a two second delay before the mode activates its appropriate relay.

OPERATING SEQUENCE / CHARACTERISTICS AND FEATURES

Compressor Operation

The run state of the compressor is determined by the difference between the indoor ambient temperature and the set temperature. See specifi c mode of operation for details.

Compressor Time Delay: 180 seconds

This feature is initiated every time the compressor is de- energized, either due to:

(1)satisfying the temperature set point

(2)changing mode to fan only

(3)a power interruption or

(4)turning the unit off

The compressor is also time delayed for 3 minutes when the control is fi rst plugged in or power is restored after failure. When the compressor cycles off as a result of satisfying the “load”, the time delay is typically timed out during the off cycle. Compressor time delay is bypassed by “Test Mode”.

Return Air Temperature Sensor

The control range is 60°F to 90°F +/- 2.0°F.

Frost Protection Sensor

Temperature settings:

Disable the compressor when sensing 30° +/- 3°F for 2 minutes continuously.

Enable compressor @ 55° +/- 5°F.

The fan should not be affected by the Frost Protection. It should continue to function normally if freeze protection is called for.

COOL MODE FOR XQ MODELS

When in the COOL mode, the control will turn on the compressor when the indoor temperature is 1.5°F above the set point and turn off the compressor when the ambient gets below the set point by 1.5°F. The fan will run continuously.

MONEY SAVER MODE

When in MONEY SAVER mode, the system will be turned on when the indoor temperature gets above the set point by 0.75°F and turns off when the indoor temperature gets below the set point by 0.75°F. The fan will turn on 5 seconds before the compressor and turn off 5 seconds after the compressor stops. If the compressor is delayed the fan will continue to run while the compressor restarts. If the thermostat remains satisfi ed for more than approximately 9 minutes, the fan will turn on for a period of 90 seconds for air sampling. Operation in MONEY SAVER mode will light both the MONEY SAVER and COOL indicators.

FAN ONLY MODE

When in the FAN ONLY mode, the compressor will not operate. The fan will run continuously at the user-selected speed (see “Fan Speed Set” below). Smart Fan is not available in FAN ONLY Mode.

FAN SPEED SET

XQ fan speed is changed by pressing FAN SPEED button and scrolling through F1, F2, F3 and SF (Smart Fan) in the digital display.

There will be a 2 second delay before the fan speed changes to prevent unnecessary switching of the relays during fan speed selection.

SMART FAN

On the XQ model, smart fan is activated by pressing the FAN SPEED button and scrolling through speeds until “SF” appears in the digital display. Using the remote control, Smart Fan is selected by the fourth push of Fan Speed button.

Smart fan changes fan speeds based on the temperature differential between the ambient and set temperatures.

CHECKING ROOM TEMPERATURE

Check the room temperature at the electronic control pad by pressing the “FAN SPEED” button and the “TEMP” button at the same time on XQ models.

The indoor temperature will display for 10 seconds. Indoor temperature can be viewed in all modes, including the TEST mode. The display can be changed back to SET temperature by pressing any key, except the ON/OFF button, or after 10 seconds has elapsed.

KEEP ALIVE

The electronic control has a memory to retain all functions and status as set up by the user in the event of a power failure. Once power is restored to the unit there is a two second delay before the fan comes on and approximately three minutes delay before the compressor is activated, providing that the mode was set for cooling and the set point temperature has not been met in the room.

REBOOT/RESET THE CONTROL BOARD

With unit on, press “MODE” and “TEMP/HOUR ” buttons simultaneously for 10 seconds. If the panel will reboot, you will hear the fan come on and the temperature window will read 60°F. If this happens, turn the unit off for about 10 seconds and then turn it back on to fi nish the reboot cycle. If the panel does not reboot, you possibly need to replace it.

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Friedrich XQ05M10, EQ08M11, XQ06M10, XQ10M10, XQ08M10 service manual Electronic Control Sequence of Operation
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XQ08M10, XQ10M10, XQ05M10, XQ06M10, EQ08M11 specifications

Friedrich offers a range of innovative air conditioning units designed to provide superior comfort and energy efficiency. Among its lineup, the XQ06M10, EQ08M11, XQ05M10, XQ08M10, and XQ10M10 models stand out due to their advanced technologies and user-friendly features.

The XQ series, with models like XQ06M10 and XQ05M10, is renowned for its sleek design and exceptional performance in cooling and heating environments. These models utilize a highly efficient compressor system that reduces energy consumption while maintaining optimal temperature control. The XQ06M10, for example, is designed for medium-sized rooms, featuring a cooling capacity that caters well to residential and small office settings.

On the other hand, the EQ08M11 model is known for its enhanced energy efficiency compared to traditional units, thanks to its inverter technology. This feature allows the compressor to adjust its speed according to the cooling demand, resulting in lower energy costs and a quieter operation. The EQ08M11 is also equipped with a multi-stage filtration system, improving indoor air quality by capturing dust, allergens, and pollutants.

The XQ08M10 and XQ10M10 cater to larger spaces, with their respective higher cooling capacities making them suitable for bigger living areas or small commercial settings. Both models boast an easy-to-use digital control panel, which requires minimal effort to adjust settings. Additionally, they include a programmable timer feature, allowing users to automate operation according to their daily schedules, further enhancing energy savings.

All these models showcase Friedrich’s commitment to durability and reliability, built with high-grade materials designed to withstand varying temperatures and humidity levels. The XQ series is compact, facilitating easy installation without compromising performance.

In summary, the Friedrich XQ06M10, EQ08M11, XQ05M10, XQ08M10, and XQ10M10 models combine cutting-edge technology with practicality, ensuring an efficient and enjoyable indoor climate. With features aimed at energy efficiency, ease of use, and effective air filtration, these units represent a smart investment for anyone looking to enhance their living or working environment.
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