E2 Lack of power of temperature sensor copper tubes and PCB wires. Air filter is full 4. E6 INDOOR PROBE SHORT: The control assumes that the ambient temperature is 90 degrees F and the unit will operate. Problem: When the unit’s LED shows E2 Possible Cause: There may be a broken or short circuit on the brass temperature sensor (applicable only to the COOI / heat unit). Error coding for “we / y” model. To protect the unit’s compressor, if you turn the unit off or if power is interrupted, there is a three-minute delay. Change the probe. 2 times – DC link voltage is below 140Vdc off, 24 L_P / H_P Switch – Low / High Press Switch Open Close, 25 low voltage / over voltage – abnormal AC voltage input off, 26 DC Compressor Status Error – Compressor Start Fall Collapse Error, 27 PSC / PFC error – inverter PCB input current is over100A (peak) for 2us off, 29 over current comp – inverter compressor turned off, 40 CT sensor (short/open) – CT circuit malfunction, 41 INV. Press the Temp / Hour button to see the reverse order of the error code. Keep unit running, Code translation: if unit cycle (heat or cold demand) <3 times per hour, Code Translation: Room Freeze Protection Trigger, Possible reasons: room temperature drops below 40 ° F. The error code must be in unit test mode to enter the function. Leaking water inside the house. The temperature set point will appear when the end of the stored error code is reached. Issues with your Registration? Problem: When the unit’s LED shows E1 Possible Cause: There may be a broken or short circuit on the ambient temperature sensor Remedy: Please check if this is a sensor problem. Constructed from the highest-quality materials and components, these air conditioners are built to exacting standards, yet among the most quiet and energy-efficient air conditioners available. Most commonly, consumers tend to contact Friedrich Air Conditioning to ask questions about: Product/ Service, Request for Information, Shipping and Delivery. The evaporator is frozen the treatment: 1. The Frederich Smart Center constantly monitoring the operation of the PT-AC unit and will store the service code if certain conditions are witnessed. Have power failure 2. plug is not connected 3. Air conditioner manufacturer Friedrich offers expert advice, research, insights on how to keep cool and stay energy efficient. PTAC – PD Series Packaged Terminal Air Conditioner Packaged Terminal Heat Pumps, E4 High discharge temperature protection of compressor, EU limit / freq-uency reduction due to high temperature of module, C5 jumper cap malfunction protection Foam collecting refrigerant, F1 indoor ambient temperature sensor is open / small circuit, F2 indoor evaporator temperature sensor is open / small circulated, F3 outdoor ambient temperature sensor is open / small circulated, F4 outdoor condenser temperature sensor is open / small circulated, F5 outdoor discharge temperature sensor is open / small circulated, F6 limit / decrease freq-uency due to over lode, F9 Reduction in freq-uency of due to high air discharge, FH limit / decrease freq-uency due to antifreezing, P0 compressor minimum freq-uency in test state, P1 compressor rated freq-uency at test stage, P2 compressor maximum freq-uency in test state, P3 compressor intermediate freq-uency in test state, P5 Overcrack protection of phase current for compressor Capacitor PU charging fault, P7 module temperature sensor circuit malfunction, H0 freq-uency of decreases due to high temperature resistor during heating operation, H6 internal motor (fan motor) does not operate, LP does not match indoor unit and outdoor unit, U1 malfunction of phase current detection circuit for compressor, U3 malfunction of voltage dropping for DC bus bar, U5 malfunction current detection of complete units, U9 Zerocrossing Outdoor Unit Malfunction Digital Control Diagnostics and Test Mode, Error Code: 02 Code Translation: Extremely low voltage conditions exist <198V for 230V units and <239V for 265V units Action taken by the unit: shutdown unit. 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