Friedrich Air Conditioner Error Codes



  1. PTAC Error Codes
  2. Window Air Conditioner
  3. Portable Error Codes
  4. Heat Pump Error Codes
  5. Multi Zone Air Conditioner

1. Friedrich PTAC Error Codes:

Friedrich PTAC Error Codes
Friedrich PTAC Error Codes

The Friedrich Smart Center continuously monitors the PTAC unit operation and will store service codes if certain conditions are witnessed. In some cases the unit may take action and shut the unit off until conditions are corrected.

PTAC – PD Series
Packaged Terminal Air Conditioners
Packaged Terminal Heat Pumps

Error CodesProblem
E1High pressure protection of system
E2Antifreezing protection
F0In defect of refrigerant
E4High discharge temperature protection of compressor
E5Overcurrent protection
E6Communication Malfunction
E8High temperature resistant protection
EEEEPROM malfunction
EULimit/decrease frequency due to high temperature of module
C5Malfunction protection of jumper cap
FoGathering refrigerant
F1Indoor ambient temperature sensor is open/short circuite
F2Indoor evaporator temperature sensor is open/short circuited
F3Outdoor ambient temperature sensor is open/short circuited
F4Outdoor condenser temperature sensor is open/short circuited
F5Outdoor discharge temperature sensor is open/short circuited
F6Limit/ decrease frequency due to overload
F8Decrease frequency due to overcurrent
F9Decrease frequency due to high air discharge
FHLimit/ decrease frequency due to antifreezing
PHVoltage for DC bus-bar is too high
PLVoltage of DC bus-bar is too low
P0Compressor Min frequence in test stat
P1Compressor rated frequence in test state
P2Compressor maximum frequence in test state
P3Compressor intermediate frequence in test stat
P5Overcurrent protection of phase current for compressor
PUCharging malfunction of capacitor
P7Malfunction of module temperature sensor circuit
P8Module high temperature protection
H0Decrease frequency due to high temperature resistant during heating operation
H1Defrosting
H2Static dedusting protection
H3Overload protection for compressor
H4System is abnormal
H5IPM protection
H6Internal motor (fan motor) do not operate
H7Desynchronizing of compressor
HCPFC protection
L3Outdoor DC fan motor malfunction
L9Power protection
LPIndoor unit and outdoor unit doesn't match
LCFailure startup
U1Malfunction of phase current detection circuit for compressor
U3Malfunction of voltage dropping for DC bus-bar
U5Malfunction of complete units current detection
U7The four-way valve is abnormal
U9Zerocrossing malfunction of outdoor unit

Friedrich PTAC Troubleshooting 




CAUSERESULT
System is not serviced or inspected regularly (semiannually or annually)Can result in premature component failures, poor performance and increased operating costs
Air filters are not cleaned regularly and become blocked with particlesMay result in poor cooling, icing and water problems as well as component failures and increased operating costs
Condenser coil not maintained properly (blocked with particles)May result in poor cooling, component failures and increased costs
Evaporator coil not maintained properly (blocked with particles)May result in poor cooling, icing and water problems, and increased operating costs
Components that show signs of fatigue not replacedMay result in multiple service calls, poor performance and increased operating costs
Condensate drains and drain lines not maintainedMay result in water and odor problems

2. Friedrich Window / Room Air Conditioner Error Codes:

Friedrich Window Room Air Conditioner Error Codes
Friedrich Window Room Air Conditioner Error Codes
Fault CodesSolution
CH01Indoor Air Sensor Error. Indoor air sensor open or short.
CH09EEPROM CheckSum Error. EEPROM reading date error.
CH34High Pressure Error. As high pressure,comp off over 10 times in 1 hour.



3. Friedrich Portable Error Codes:

Friedrich Portable AC Error Codes and Troubleshooting
Error CodesCause
E1Electrical short on both temperature sensor and PCB.
E2Electrical short of temperature sensor copper tube and PCB wiring.
E4Indicates water tank full or poor contact of signal plug. User needs to pull out the rubber stopper which is located at the bottom of the unit, to drain the water away. Check that the plug has been wired correctly.

Friedrich Portable AC Troubleshooting

Friedrich Portable AC Troubleshooting
ProblemPossible Cause
The airconditioner doesn't workThere is a power failure, Wait for the power return.
The plug is not connected. Connect the plug.
The timer is unable to work. Provide repairment.
The main switch has not been pressed. Press the main switch.
The airconditioner works for short period onlyThe set temperature is too close to the room's temperature. Decrease the setting temperature.
There is something blocking the suction vent on the back of condenser. Remove any obstacles.
The fan on the condenser is blocked. Provide repairment.
The airconditioner switches are off constantlyMalfunction. Turn off the appliance remove the plug and contact the service center.
The appliance is very noisy and vibrates violentlyThe compressor blocking device has been loosen or the copper pipe is getting in touch with the body of the set. Provide repairment.
When LED of unit shows E1There might be a broken or short circuit on ambient temperature sensor. Please check if it is sensor's problem. If not, contact manufacturer for replacing the PCB.
When LED of unit shows E2There might be a broken or short circuit on brass temperature sensor (only applicable for cooI/heat unit). Please check if it is sensor's problem. If not, contact manufacturer for replacing the PCB.
Friedrich Portable AC Remote Control

Digital Control Diagnostics and Test Mode

Error Code: 02

Code Translation: An extreme low voltage condition exists <198V for 230V units and <239V for 265V units

Action Taken by Unit: Shut down unit. Display Error code and flash. Once voltage rises to normal level system power is restored

Possible Cause:

  • Inadequate power supply
  • Defective breaker
  • Blown fuse

Error Code: 03

Code Translation: Return air thermistor sensor open or short circuit

Action Taken by Unit: Set return air sensor = 75°F. Alternate flash set point and error code. Leave unit running




Possible Cause: Defective sensor

Error Code: 04

Code Translation: Indoor coil thermistor sensor open Or short circuit

Action Taken by Unit: Set ID coil temp = 40°F. Alternate flash set point and error code. Leave unit running

Possible Cause: Defective sensor

Error Code: 05

Code Translation: Outdoor coil thermistor sensor open Or short circuit

Action Taken by Unit: SetOD coil temp = 20°F. Alternate flash set point and error code. Automatically change over to Electric heat Mode only. Leave unit running

Possible Cause: Defective sensor

Error Code: 06

Code Translation: If O.D. coil Temperature > 175 Deg F for 2 consecutive minutes. (Heat Pump models only)

Action Taken by Unit: Alternate flash set point and error code. Shut unit down for 5 minutes, then try again 2 times, if fails the 3rd time, then shut down unit

Possible Cause:

  • Dirty coil
  • Fan motor failure
  • Restricted air flow
  • Non-condensables in refrigeration system

Error Code: 07

Code Translation: I.D coil temperature <30 Deg F for 2 consecutive minutes



Action Taken by Unit: Alternate flash set point and error code. Continue fan operation while the compressor is locked out until the indoor coil thermistor reaches 45° F, and then energize the compressor. However, compressor must still wait a lockout time of 180 to 240 seconds

Possible Cause:

  • Dirty filters
  • Dirty coil
  • Fan motor failure
  • Restricted airflow
  • Improper refrigerant charge
  • Restriction in refrigerant circuit

Error Code: 08

Code Translation: If unit cycles (Heat or Cool demand)> 9 times per hour

Action Taken by Unit: Alternate flash set point and error code. Keep unit running

Possible Cause:

  • Unit oversized
  • Low load conditions

Error Code: 09

Code Translation: If unit cycles (Heat or Cool demand)< 3 times per hour

Action Taken by Unit: Alternate flash set point and error code. Keep unit running

Possible Cause:

  • Unit undersized
  • High load conditions

Error Code: 10

Code Translation: Room Freeze Protection triggered

Action Taken by Unit: Alternate flash set point and error code. Keep unit running

Possible Cause: Room temperature fell below 40°F

Friedrich PTAC Parts
Friedrich PTAC Parts

4.Friedrich Air Conditioner Heat Pump Error Codes:

Friedrich Thru-the-wall Air Conditioners and Heat Pumps
Friedrich Thru-the-wall Air Conditioners and Heat Pumps



Error Code Mode is used to display all error codes stored since reset. It is a sub-mode of Test Mode.

Error CodesProblem
ERROR CODES LISTINGFOR “WS” MODELS
E1SHORT CYCLE SITUATION: Defined as a compressor that starts and stops more frequently than it should (more than 6 times per hour).
E2KEYBOARD STUCK ERROR: If any key button is stuck or pressed for 20 seconds or more, the unit considers it stuck. If a key is stuck it will be ignored until released. If the “Mode” key is stuck, the unit’s function will default to Cool mode.
E3FROST PROBE OPEN: Normal operation is allowed. Replace probe.
E4FROST PROBE SHORT: Normal operation is allowed. Replace probe.
E5INDOOR PROBE OPEN: Control assumes indoor ambient temperature is 90 degrees F and unit will operate. Replace probe.
E6INDOOR PROBE SHORT: Control assumes ambient temperature is 90 degrees F and unit will operate. Replace probe.
ERROR CODES LISTINGFOR “WE/WY” MODELS
E1SHORT CYCLE SITUATION: Defined as a compressor that starts and stops more frequently than it should (more than 6 times per hour).
E2KEYBOARD STUCK ERROR: If any key button is stuck or pressed for 20 seconds or more, the unit considers it stuck. If a key is stuck it will be ignored until released. If the “Mode” key is stuck, the unit’s function will default to Cool mode.
E3AMBIENT (INDOOR) AIR PROBE OPEN OR SHORT: Control will assume ambient temperature is 90 degrees F when in Cool mode and 60 degrees F when in Heat mode. Unit will operate (see note below).
E4EVAPORATOR TEMPERATURE PROBE OPEN OR SHORT: Normal operation is allowed. Replace probe.
E5CONDENSER TEMPERATURE PROBE OPEN OR SHORT: Normal operation is allowed. Replace probe.
E7MOTOR OPERATION
E9HEAT PUMP FAILURE

Unit must be in Test Mode to enter the Error Code function. Activating Error Code Mode: Press the TIMER On/Off” button (see figures 4 and 5). The LED for the TIMER On/ Off will flash 1 bps (beats per second) while Error Code Mode is active. Pressing the Temp/Hour button will display “00”. Consecutive presses will scroll through all error codes stored. Press the Temp/Hour button to see the reverse order of the error codes. When the end of the stored error codes is reached the temperature Set Point will appear. (Each error code is listed once).

figures 4 and 5
figures 4 and 5

Exiting Error Code Mode: press the Timer On/Off button. Clearing Error Codes: Error codes are cleared
from the memory by exiting from Error Code Mode.

Memory

The electronic control has a memory to retain all functions and settings, as set up by the user, in the event of a power failure. For example: 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.

Automatic component protection

Your unit is equipped with Automatic Component Protection. To protect the compressor of the unit, there is a three minute delay if you turn the unit off or if power is interrupted. The fan will not be affected. Also, if you switch fromCool mode to Fan Only mode, and switch back to Cool mode, there is a three-minute delay before the compressor comes back on.

5. Friedrich Multi Zone Air Conditioner Error Codes:

Friedrich Multi Zone Air Conditioner
Friedrich Multi Zone Air Conditioner
Error CodesMeaning
Indoor Error
00No Error
01Indoor Room themistor error
02Indoor in-piping sensor error
03Remote controller error
04Drain Pump error
05Communcation error between in and out
06Indoor Out-Piping sensor error
07Differnt mode operation
09EEPROM Check Sum Error
10Indoor BLDC Fan Lock
Outdoor Error
21DC Peak (IPM Fault) - Over Rated Current Off
22CT 2(Max CT) 2times - Input Over Current Off
23DC Link Low Volt. 2times - DC Link Volt is below 140Vdc Off
24L_P/H_P Switch - Low/High Press Switch Open Off
25Low Voltage/Over Voltage - Abnormal AC Volt Input Off
26DC Compressor Position Error - Compressor Starting Fall Error Off
27PSC/PFC Fault Error - Inverter PCB input current is over100A(peak) for 2us Off
28DC Link High Volt - Off Off
29COMP Over Current - Over Inverter Compressor Current Off
32D-Pipe High (INV) - Off Off
40CT Sensor (Open / Short) - CT Circuit Malfunction Off
41INV. D-Pipe Th Error - Open/Short Off
44Outdoor Air Th Error - Open/Short Off
45Cond. Pipe Th Error - Open/Short Off
46Suction Pipe Error - Open/Short Off
51Capacity Over 5times - Over combination Off
52Signal Error(DSP Board <-> Main Board) - Communication Poorly Off
53Signal Error (Indoor <-> Outdoor) - Communication Poorly Off
60EEPROM Check Sum Error - Check Sum Mismatching Off
61Cond. Pipe Th High - Cond. Temp. High Off
62Heatsink Th High -Heatsink Temp. High Off
65Heatsink Th Error - Open/Short Off
67Outdoor BLDC Fan Lock - Outdoor Fan is not operating Off
73PFC Fault Error(S/W) - Over Current of Outdoor Unit PFC



Friedrich Air Conditioner Error Codes And Alarm Status

Error CodesProblem
1Maintenance ICON: Flash. Front Panel Button Stuck For More Than 20 Seconds Continue to monitor for "OPEN" (Unstuck) switch. Do not process switch input. ENSURE FRONT COVER DOES NOT DEPRESS BUTTONS
2Maintenance ICON: Flash. Input Voltage Out of Specification (103 - 127 / 187 - 253) Stop.Open all relays until voltage is back within specs. Resume operation.
3Maintenance ICON: Flash. Indoor Temperature Sensor is Open or Shorted Set temp to 75°F in COOLING or 68°F in HEATING. Unit continues to operate.
4Maintenance ICON: Flash. Indoor Coil Temperature Sensor is Open or Shorted Control Board sets temp to 40°F. Override sensor. Unit Continues to operate.
5Maintenance ICON: Flash. Outdoor Coil Temperature Sensor is Open or Shorted Sets temp to 20°F. Override sensor. Continue operation. Use Elec Heat if available for HEATING. If not available use HEAT PUMP if outdoor temp allows.
6Maintenance ICON: Flash. Outdoor Coil > (grater than) 175 F. Shut down for 5 min. Resume operation for 3 min. Continues to monitor. If test fails 3 times, the severity is increased and the unit operation is locked out.
7Maintenance ICON: Flash. Indoor Coil < (less than) 30 F for 2 consecutive minutes Turn compressor off. Run High Fan speed. When coil temp reachs 45°F resume operation after lockout time.
8Maintenance ICON: Log Only. Unit Cycles > (grater than) 9 Times per hour. Continue operation. Continue to monitor. Take no action. Log Only.
9Maintenance ICON: Log Only. Unit Cycles < (less than) 3 Times per Hour. Continue operation. Continue to monitor. Take no action. Log Only.
10Maintenance ICON: Log Only. Room Freeze Protection Only used if Electric Heat is available. Run High Speed and Electric heat until room temp reaches 46°F. Display "FRZ" during operation. Logged Only.
11Maintenance ICON: On. WallStat Problem or Connection Issue Severity 4 error is. Unit operates based on standard input mapping. Severity 2 error opens all relays. Unit will not operate.
12Maintenance ICON: Flash. Discharge Air > (greater than) 185 F Shutdown heat pump and electric heater. Run high fan speed until temp is 100°F. Resume operation. Third occurance in 1 hour locks unit out.
13Maintenance ICON: Flash. Prerssure Limit Switch Open If unit is cooling or heat pump on,shut down compressor. Run high fan until switch closes. Resume operation. Third occurance in 1 hour locks unit out.
14Maintenance ICON: Flash. Discharge Air Temperature Sensor is Open or Shorted Override Sensor. Set temp to 75°F. Continue to monitor. Set error code 14 ON.
15Maintenance ICON: Solid On. Heat Pump Error. If indoor coil temp < (Lesser than) ambient temp for 3 minutes. Unit uses electric heat to satisfy heating demand.
16Maintenance ICON: Flash. Temperature Beyond Operating Limits. Ambient temp < (less than) 0°F and ambient temp > (greater than) 130°F. Set error code 16 ON. When cleared return unit to normal.
17Maintenance ICON: Flash. Equipment Doesn't Meet Minimum Configuration. Must have compressor enabled and at least 2 fan speeds
18Maintenance ICON: Flash. Special Test 1 Severity Level 1. Unit shuts down. Inputs via front panel or t-stat are ignored. Qualified Technical Service required URGENT.
19Maintenance ICON: Flash. Special Test 2 Severity Level 2. Unit operates. Qualified Technical Service required.
20Maintenance ICON: Solid On. Special Test 3 Severity Level 3 Error is Logged Only. Unit operates. Severity 3 keeps unit running. Attention is needed.
21Maintenance ICON: OFF, Log Only. Special Test 4 Severity Level 4 Error is Logged Only. Unit operates. Severity 4 keeps unit running.
22Maintenance ICON: OFF, Log Only. Outdoor Coil Temperature < 30 F for 2 consecutive Minutes. Unit will use electric heat to satisfy heating demands until temp > 45°F. Unit must be a Heat Pump.
23Maintenance ICON: OFF, Log Only. Frost Protection (for Heat Pump Only Unit- YS10M10) Unit will run active defrost for a minimum of 6 minutes when Heat Pump run time is greater than 60 minutes and outdoor coil temp is 26 F or less.
24Maintenance ICON: Flash, Outdoor Air Temperature Sensor is Open or Shorted. Continue with normal operation. Continue to monitor sensor.

Wallmaster Wiring Diagram Electronic Control Cool Only Models



Wallmaster Wiring Diagram Electronic Control Cool Only Models
Wallmaster Wiring Diagram Electronic Control Cool Only Models

Friedrich Air Conditioner Heat Pump Manual PDF

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