HEAT / COOL ONLY ROOM AIR CONDITIONERS: TROUBLESHOOTING TIPS

Problem

Possible Cause

Action

 

Heat anticipator (resistor) shorted (on applicable

Disconnect power to unit. Remove resistor from

 

t-stat bulb block. Plus in unit & allow to operate.

 

models)

 

Feel resistor for heat. If not heat, replace resistor

Room temperature

 

 

 

uneven

Wide differential - partial loss of t-stat bulb charge

Replace t-stat & check

(Heating cycle)

 

 

 

 

Refer to appropriate wiring diagram. Resistor is

 

Incorrect wiring

energized during "ON" cycle of compressor or

 

 

fan.

Problem

Possible Cause

Action

 

Incorrect wiring

Refer to appropriate wiring diagram

 

Defrost control timer motor not advancing

Check for voltage at "TM" & "TM1" on timer. If no

 

(applicable models)

voltage, replace control

 

Defrost control out of calibration (applicable

If outside coil temperature is 25F or below, &

 

preselected time limit has elapsed, replace

 

models)

Unit will not defrost

defrost control

 

 

 

If contacts remain closed between terminals "2"

 

Defrost control contacts stuck

& "3" of the defrost control after preselected time

 

 

interval has passed, replace control

 

Defrost control bulb removed from or not making

Reinstall & be assured that good bulb to coil

 

good coil contact

contact is made

Problem

Possible Cause

Action

 

Exhaust or fresh air door open

Check if operating properly. Instruct customer on

 

proper use of control

 

 

 

Dirty filter

Clean as recommended in Owner's Manual

 

 

Check heat rise across coil. If unit operates

 

Unit undersized

efficiently, check if insulation can be added

 

to attic or walls. If insulation is adequate,

 

 

Does not heat

 

recommend additional unit or larger one

 

 

adequately

 

T-stat should close at 38°F. Check continuity of

 

Outdoor t-stat open (applicable models)

control. If temperature is below 38°F, replace

 

 

control

 

Heater hi-limit control cycling on & off

Check for adequate fan air across heater. Check

 

control for open at 160°F & close at 150°F

 

 

 

Shorted supplementary heater

Ohmmeter check, approx. 32-35 ohms

 

Incorrect wiring

Check applicable wiring diagram

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Page 47
Image 47
Friedrich 2009, 2008 service manual Heat / Cool only Room AIR Conditioners Troubleshooting Tips
Page 46 Page 48

2009, 2008 specifications

Friedrich 2008 and 2009 represent significant advancements in heating and cooling technology, particularly in the realm of air conditioning systems. Friedrich is known for producing robust and efficient HVAC solutions tailored for both residential and commercial applications. These models are particularly noteworthy for their innovative features and energy-efficient technologies that enhance user comfort and lower operational costs.

One of the main characteristics of the Friedrich 2008 and 2009 models is their emphasis on energy efficiency. Both units are designed to meet or exceed Energy Star standards, which indicates that they use less energy compared to standard models, contributing to greener living solutions. The incorporation of efficient compressors and high SEER (Seasonal Energy Efficiency Ratio) ratings ensures that users save money on their electricity bills while enjoying optimal cooling performance.

The units also feature advanced inverter technology, which allows for variable speed operation. This means that the system can adjust its cooling capacity based on the current temperature needs, resulting in more consistent comfort while reducing wear and tear on the equipment. Additionally, the inverter technology operates more quietly compared to traditional systems, making these models suitable for both home environments and commercial settings.

Friedrich 2008 and 2009 also provide users with enhanced control options. The inclusion of smart technology and Wi-Fi connectivity allows for remote monitoring and temperature adjustments via smartphones or tablets. Users can create schedules, set temperature preferences, and receive maintenance alerts, contributing to a more user-friendly experience.

Moreover, these models are designed with robust construction, featuring durable materials that withstand various weather conditions. Their compact footprint and sleek design make them suitable for window installation, while an array of sizes accommodates spaces of different dimensions.

Additionally, the air filtration systems in Friedrich 2008 and 2009 units improve indoor air quality. They effectively capture dust, allergens, and other particulates, ensuring a healthier environment for occupants.

In summary, Friedrich 2008 and 2009 models stand out for their energy efficiency, innovative inverter technology, smart controls, and robust construction. With a focus on user comfort and environmental responsibility, these models provide reliable solutions for effective heating and cooling in diverse applications.
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