Electronic Control Error Code Diagnostics

Error

Code Translation

Action Taken By Unit

 

Possible Cause

Code

 

 

 

 

 

EF

Error Free

None

 

Unit Operating Normally

 

 

 

 

 

 

Extreme low voltage condition exists (<198V

Shut unit down. Flash error code.

When

• Inadequate power supply

02

voltage rises to adequate level normal unit

• Defective breaker

 

for 230V units and <239V for 265V units).

operation is restored.

 

• Blown fuse

 

 

 

03

Return air thermistor sensor open or

Leave unit running. Alternately flash error

• Defective sensor

short circuit

code and set point.

 

 

 

 

04

Indoor coil thermistor sensor open or

Leave unit running. Alternately flash

 

 

short circuit

error code and set point.

 

 

 

 

 

 

 

Leave unit running. Switch to Electric Heat

 

05

Outdoor coil thermistor sensor open

Mode (Heat Pump only). Alternately flash

• Defective sensor

or short circuit

error code and set point.

 

 

 

 

 

 

 

 

 

 

Shut unit down for 5 minutes, Alternately

• Dirty coil

 

Outdoor coil Temperature > 175° F for

flash error code and set point, then try again

06

2 consecutive minutes. (Heat Pump

2 times, if unit fails the 3rd time then shut

• Fan motor failure

• Restricted air flow

 

models only)

unit down and alternately flash error code

 

Non-condensables in refrigeration system

 

 

and set point.

 

 

 

 

 

 

 

Shut down Compressor, and continue fan

• Dirty filters

 

 

operation. Alternately flash error code and

• Dirty coil

07

Indoor coil temperature <30° F for 2

set point until the indoor coil thermistor

• Fan motor failure

consecutive minutes.

reaches 45° F. Then, (after lockout time of

• Restricted air flow

 

 

 

180 to 240 seconds expires), re-energize

• Improper refrigerant charge

 

 

the compressor .

 

• Restriction in refrigerant circuit

 

Unit cycles (Heat or Cool demand) >

Leave unit running. Store error code in

• Unit oversized

08

memory.

 

9 times per hour

 

• Low load conditions

 

 

 

 

 

 

 

09

Unit cycles (Heat or Cool demand) <

Leave unit running. Store Error Code in

• Unit undersized

memory.

 

3 times per hour

 

• High load conditions

 

 

 

 

 

 

 

 

 

Leave unit running. Alternately flash error

 

10

Room Freeze Protection triggered

code and set point.

 

• Room temperature fell below 40°F

 

 

 

 

 

11

No Signal to “GL or “GH” terminal

Shut unit down. Flash error code.

 

• Defective remote thermostat

 

• Defective thermostat wiring

 

 

 

 

 

High Pressure switch open (24K BTU Only)

 

 

• Dirty coil

13

Shut unit down. Flash error code.

 

• Fan motor failure

Jumper wire loose/missing (9-18K BTU)

 

• Restricted air flow

 

 

 

 

 

 

 

Non-condensables in refrigeration system

14

Discharge air temperature sensor open or

Leave unit running. Alternately flash error

• Dip switch # 8 set to "OFF" position

shorted

code and set point.

 

 

 

 

 

 

 

 

 

Diagnostics

The Electronic control 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 seconds. 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 built-in timers and delays on the VPAK may be bypassed by pressing the ‘Cool’ and ‘Low Fan’ buttons simultaneously for three seconds while in any mode to enter the test mode. CE will be displayed when en- tering test mode, and OE will be displayed when exiting. The test mode will automatically be exited 30 minutes after entering it or by pressing the ‘Cool’ and ‘Low Fan’ buttons simultaneously for three seconds.

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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Friedrich H)A12K25L, R410A, H)A09K34L, H)A24K25L, H)A12K50L, H)A12K34L Electronic Control Error Code Diagnostics, Test Mode

H)A09K25L, H)A12K50L, H)A09K50L, H)A24K10L, H)A24K25L specifications

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