COOLING ONLY ROOM AIR CONDITIONERS: TROUBLESHOOTING TIPS

PROBLEM

POSSIBLE CAUSE

ACTION

 

 

 

 

Low voltage

Check voltage at compressor. 115V & 230V

 

units will operate at 10% voltage variance

 

 

 

 

 

 

T-stat not set cold enough or

Set t-stat to coldest position. Test t-stat &

 

inoperative or electronic control

 

replace if inoperative

 

board is bad

 

 

 

 

 

 

Compressor hums but cuts off on

Hard start compressor. Direct test compressor.

Compressor

overload

If compressor starts, add starting components

 

does not run

 

 

Open or shorted compressor

Check for continuity & resistance

 

 

windings

 

 

 

 

 

 

Open overload

Test overload protector & replace if inoperative

 

 

 

 

Open capacitor

Test capacitor & replace if inoperative

 

 

 

 

Inoperative system switch,

Test for continuity in all positions. Replace if

 

thermistor or electronic board

inoperative switch or electronic board.

 

 

 

 

Broken, loose or incorrect wiring

Refer to appropriate wiring diagrams to check

 

wiring

 

 

 

 

 

 

 

 

PROBLEM

POSSIBLE CAUSE

ACTION

 

 

 

 

Inoperative system switch

Test switch & replace if inoperative

 

Broken, loose or incorrect wiring

Refer to applicable wiring diagram

 

 

 

Fan motor

Open capacitor

Test capacitor & replace if inoperative

does not run

 

 

Fan speed switch open

Test switch & replace if inoperative

 

 

 

 

Inoperative fan motor

Test fan motor & replace if inoperative (be sure

 

internal overload has had time to reset)

 

 

 

 

 

 

 

 

PROBLEM

POSSIBLE CAUSE

ACTION

 

 

 

 

Undersized unit

Refer to industry standard sizing chart

 

 

 

 

Thermistor or electronic board is bad,

Set to coldest position. Test t-stat or electronic

 

T-stat open or inoperative

control board & replace if necessary.

 

 

 

 

Dirty filter

Clean as recommended in Owner’s Manual

 

 

 

 

Dirty or restricted condenser or

Use pressure wash or biodegradable cleaning

Does not cool or

evaporator coil

agent to clean

only cools slightly

Poor air circulation

Adjust discharge louvers. Use high fan speed

 

 

 

 

Fresh air or exhaust air door open

Close doors. Instruct customer on use of this

 

on applicable models

feature

 

 

 

 

Low capacity - undercharge

Check for leak & make repair

 

 

 

 

Compressor not pumping properly

Check amperage draw against nameplate. If

 

not conclusive, make pressure test

 

 

 

 

 

32

Page 32 Page 34
Page 33
Image 33
Friedrich XQ10M10, EQ08M11, XQ06M10, XQ05M10, XQ08M10 service manual Cooling only Room AIR Conditioners Troubleshooting Tips
Page 32 Page 34

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.
Top Page Image Contents