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28
Malfunction Possible Reasons Solution
Outlet temperature is not always
cooling/heating
Outlet temperature is not high enough when
heating by heat pump.
When outdoor ambient temp is low, the heat
pump will not be able to offer enough heat. Soon
after that, the E-heater will come on to heat.
Fan stops when cooling/heating.
It is normal when the CONSTANT FAN is OFF.
Youcan enable the CONSTANT FAN.
Outdoor is dripping water
Not install the drain pipe kit.
Install the drain pipe kit.
Indoor is dripping water
Wall sleeve is not installed correctly.
Install the wall sleeve according to the
installation manual.
Indoor coil freeze
Outdoor temperature is too low in cooling
mode.
When outdoor temperature is drop to 12.8℃（55
℉）or below, it will cause that indoor coil freeze.
Open the fresh air door, and running at fan mode.
Filter is dirty.
Clean the filter to recover the normal air flow
E2 Indoor return air
temperature sensor failure
Indoor return air temperature sensor open
circuit or short circuit.
Check the sensor connecting. If the sensor is bad,
replace a new one.
E3 Indoor coil temperature
sensor failure
Indoor coil temperature sensor open circuit
or short circuit.
Check the sensor connecting. If the sensor is bad,
replace a new one.
E4 indoor air outlet temperature sensor
failure/air blow out over heat in electric
heat mode
Indoor air outlet temperature sensor open
circuit or short circuit;
Indoor filter gets dirty or something blocks
the air intake.
Check the sensor connecting. If the sensor is bad,
replace a new one.
Clean the filter and clean the air way.
E5 Outdoor coil
temperature sensor failure.
Outdoor coil temperature sensor open
circuit or short circuit.
Check the sensor connecting. If the sensor is bad,
replace a new one.
E8 Overheating
protection/defrosting
Indoor fan failure/dirty filter/refrigerating
system failure/indoor coil temperature
sensor failure.
Check the indoor fan/clean filter/refill refrigerant/
replace indoor coil sensor.
E9 High pressure
protection
Outdoor fan failure/refrigerating system
failure/high pressure switch
failure/outdoor coil temp sensor broken.
Check outdoor fan/refrigerating pipe system/high
pressure switch/outdoor coil temp sensor.
Service &Assistance
Before calling for service,please check the "Basic Troubleshooting"sec-
tion above.This may help you to the answer to your problem,avoid unne-
cessary service calls,and save you the cost of a service call if the probl-
em is not due to the product itself.If you have checked the "Basic Trouble
shooting" section and still need help,here is a list of available services:
You can find the name of you local Authorized Service Provider by visiting
our web site at www.friedrich.com.
If you require further assistance you can call the Customer Support Call
Center at 1-800-541-6645.
Before calling,please make sure that you have the complete model and
serial number,and date of purchase of your equipment available.By provid-
ing us with this information we will be better able to assist you.
Our specialists are able to assist you with:
* Inspect and ensure that all components and accessories have been
installed properly and that they have not been damaged during the
installation.
* Specifications and Features of our equipment.
* Referrals to dealers, and distributors.
* Use and Care information.
* Recommended maintenance procedures.
* Installation information.
* Referrals to Authorized Service Providers and Parts depots.
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