Emerson Commander SK Trip Codes

Trip Codes for Commander SK by Control Techniques

HF01 to HF03
Not used
HF04
Low DC bus at power up- may indicate an AC Input or pre-charge problem
HF05
No internal handshake signal from second processor (DSP) at start up
HF06
Unexpected interrupt
HF07
Watchdog failure
HF08
Interrupt crash (code overrun)
HF09 to HF10
Not used
HF11
Access to the EEPROM failed- tried to read stored parameter data but failed
HF12 to HF19
Not used
HF20
Power stage – code error Tried to read power board and read back erroneous
HF21
Power stage – unrecognized frame size
HF22
Overcurrent detection at power up- possible output short or bridge failure
HF23
DSP software overrun
HF24
Not Used
HF25
DSP Communications failure- communication from main to 2nd processor
HF26
Soft start relay failed to close; or soft start monitor failed; or braking
IGBT short circuit at power up
HF27
Power stage thermistor fault
HF28
Power circuit thermistor 2 or 3 fault Internal fan fault on size 3 only
HF29
Fan failure (current too high – only on drives with a fan) see note below
HF30
Not used
HF31
Internal Cap Bank Fan failure- check for fan rotation/blockage Size 4 and up
HF32
Power circuit temperature feedback multiplexer failure

25 thoughts to “Emerson Commander SK Trip Codes”

  1. HF04
    Low DC bus at power up- may indicate an AC Input or pre-charge problem
    What are best ways to troubleshoot clear this code above

    1. Good morning , i have an error ” HF04 ” on my driver .

      i want a way to fix this error.

      thank you

  2. HF20
    Power stage – code error Tried to read power board and read back erroneous.
    What are best ways to troubleshoot clear this code above

  3. Have a HF-26 Fault anything that I can check to correct this cycling power and reset pushbutton have no effect.

      1. CHECK YOUR POWER PACK CCT THERE IS A RELAY AT LEFT HAND CONNER CHECK IF OK OR NOT. OTHERWISE REPLACE

  4. A/C voltage phase loss alarm, if i discontact from the compressor the alarm goes, if i wire the compressor back to the inverter the code instantly appears.
    is my compressor faultly or the inverter

  5. good day, I have a problem of HF19 errors on our emerson drives, would you kindly advise how resolve this problem

  6. good day, I have a problem of HF19 errors on our emerson drives, would you kindly advise how resolve this problem

  7. HF20
    Power stage – code error Tried to read power board and read back erroneous,

    HF26
    Soft start relay failed to close; or soft start monitor failed; or braking

    how to fix this error

  8. hi,
    please help me on Emerson Unidrive M200. my drive shows ER 01.5C fault.
    What fault is ER01.5C ?
    many thanks
    Sbu Sibeko

  9. I have HF07 and HF25 errors on Commander SK emerson VFD. How can I fix them.
    HF07: Watchdog failure

    HF25: DSP Communications failure- communication from main to 2nd processor

  10. TRY TO RUN YOUR COMRERSSOR WITHOUT THE DRIVE. IF IT RUNS CHECK YOUR AMPERAGE AND CONFIRM SAME ON THE DRIVE SETTINGS

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