electronic control error codes diagnostics and test mode (Continued)
The chart below lists the possible error codes and their description:
Error |
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Code | Code Translation | Action Taken by Unit | Possible Cause |
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EF | “Error Free” - No Codes Stored | None | Unit Operating Normally |
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02 | An extreme low voltage condition | Shut down unit. Display Error code and | • Inadequate power supply |
| exists <198V for 230V units and | ash. Once voltage rises to normal level | • Defective breaker |
| <239V for 265V units. | system power is restored. | • Blown fuse |
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03 | Return air thermistor sensor open or | Set return air sensor = 75°F. Alternately | • Defective sensor |
| short circuit | ash set point and error code. Leave unit |
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| running. |
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04 | Indoor coil thermistor sensor open or | Set ID coil temp = 40°F. Alternately ash | • Defective sensor |
| short circuit | set point and error code. Leave unit running. |
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05 | Outdoor coil thermistor sensor open | Set OD coil temp = 20°F. Alternately ash | • Defective sensor |
| or short circuit | set point and error code. Automatically |
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| change over to Electric heat Mode only. |
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| Leave unit running. |
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06 | If O.D. coil Temperature > 175° F for | Alternately ash set point and error code. | • Dirty coil |
| 2 consecutive minutes. (Heat Pump | Shut unit down for 5 minutes, then try again | • Fan motor failure |
| models only) | 2 times, if fails the 3rd time then shut down | • Restricted air ow |
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| unit. | • |
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07 | I.D coil temperature <30° F for 2 | Alternately ash set point and error | • Dirty lters |
| consecutive minutes. | code. Continue fan operation while the | • Dirty coil |
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| compressor is locked out until the indoor | • Fan motor failure |
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| coil thermistor reaches 45° F, then energize | • Restricted airow |
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| the compressor. However, compressor | • Improper refrigerant charge |
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| must still wait a lockout time of 180 to 240 | • Restriction in refrigerant circuit |
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| seconds. |
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08 | Unit cycles (Heat or Cool demand) > | Store error code in memory. | • Unit oversized |
| 9 times per hour | Keep unit running | • Low load conditions |
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09 | Unit cycles (Heat or Cool demand) < | Store Error Code in memory. | • Unit undersized |
| 3 times per hour | Keep unit running | • High load conditions |
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10 | Room Freeze Protection triggered | Alternately ash set point and error code. | • Room temperature fell below 40°F |
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| Keep unit running. |
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11 | No Signal to “GL or “GH” terminal | Shut down unit. Display error code and | • Defective remote thermostat |
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| ash. | • Defective thermostat wiring |
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13 | High Pressure switch open | Turn OFF compressor. Flash error code | • Dirty coil |
VPAK |
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| • Fan motor failure |
24K BTUs |
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| • Restricted air flow |
ONLY |
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| • | |
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Diagnostics
The Friedrich Smart Center continuously monitors the VPAK 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. To access the error code menu press the ‘Heat’ and ‘High Fan’ buttons simultaneously for three sec- onds. If error codes are present they will be displayed. If multiple codes exist you can toggle between messages using the temp up button. To clear all codes press the temp down button for three seconds while in the error code mode. To exit without changing codes press the ‘Low Fan’ button.
Test Mode
For service and diagnostic use only, the
Note: To access the Test Mode while under remote wall thermostat operation, remove thermostat’s wires at the terminal block on the electronic control board then connect a jumper wire between GL and GH.
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