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APPENDIX C — Motormaster® V Configuration (cont)

Drive Programming —

Refer to Motormaster V Pro-

gram Parameters table for each of the operating modes. Refer

to Troubleshooting section below before attempting to change

programming in the Motormaster V control.

To enter password and change program values:

1. Press the MODE button. The upper right decimal point

will flash and the display will read “00”.

2. To enter the programming mode to access the parameters,

press the MODE button. This will activate the PASS-

WORD prompt (if the password has not been disabled).

The display will read “00” and the upper right-hand deci-

mal point will be flashing.

3. Use the DOWN and UP buttons to scroll to the password

value (the factory default password is “111”) then press

the MODE button. Once the correct password value is en-

tered, the display will read “P01”, indicating that the pro-

gramming mode has been accessed at the beginning of

the parameter menu (P01 is the first parameter).

NOTE: If the display flashes “Er”, then the password was

incorrect, and the process to enter the password must be

repeated.

4. Press MODE to display present parameter setting. The

upper right decimal point will flash. Use DOWN arrow

button and the UP arrow button to scroll to the desired

parameter number.

5. Once the desired parameter number is found, press the

MODE button to display the present parameter setting.

The upper right-hand decimal point will begin flashing,

indicating that the present parameter setting is being dis-

played, and that it can be changed by using the UP and

DOWN buttons.

6. Use the DOWN arrow and UP arrow buttons to change

setting then press Mode to store the new setting. Pressing

the Mode button will store the new setting and also exit

the programming mode.

7. To change another parameter, press the MODE button

again to re-enter the programming mode (the parameter

menu will be accessed at the parameter that was last

viewed or changed before exiting). If the Mode key is

pressed within two minutes of exiting the programming

mode, the password is not required access the parameters.

After two minutes, the password must be entered in order

to access the parameters again.

To change password:

1. Enter the current password.

2. Change parameter P44 to the desired password.

To reset factory defaults:

To recognize a factory reset, the VFD (variable frequency

drive) must see a change in P48 while start jumper is removed.

See MMV Configuration table. Use Service Test mode to ener-

gize control as required by starting a compressor.

1. Remove power from the Motormaster V control.

2. Remove start jumper and then apply power to Motor-

master V control.

3. Enter programming mode by entering password (see pre-

vious section).

4. Scroll to P48 by using UP and DOWN arrow buttons and

then press MODE. One of the 12 mode numbers will

appear.

5. Restore factory defaults by changing the value in P48

using UP and DOWN arrow buttons and then storing the

value by pressing MODE.

6. Press Mode again to re-display the value of P48. Change

the value of P48 to the desired factory default mode using

the UP and DOWN arrow buttons then press MODE.

7. Motormaster V control is now restored to factory settings.

8. Remove power from Motormaster V control.

9. Reinstall start jumper matching the mode selected in the

above steps and reapply power to drive.

Troubleshooting —

Troubleshooting the Motormaster V

control requires a combination of observing system operation

and VFD display information.

If the liquid line pressure is above the set point and the VFD

is running at full speed (60 or 50 Hz), this is a normal condi-

tion. The fan can not go any faster to maintain set point.

The MMV also provides real time monitoring of key inputs

and outputs. The collective group is displayed through parame-

ters 50-56 and all values are read only. These values can be

accessed without entering a password.

1. Press MODE twice and P50 will appear.

2. Press MODE again to display value.

Use UP and DOWN keys to scroll through parameters

P51-P56 then press MODE to display the value.

• P50: FAULT HISTORY — Last 8 faults

• P51: SOFTWARE version

• P52: DC BUS VOLTAGE — in percent of nominal. Usu-

ally rated input voltage x 1.4

• P53: MOTOR VOLAGE — in percent of rated output

voltage

• P54: LOAD — in percent of drives rated output current

rating

• P55: VDC INPUT — in percent of maximum input:

100% will indicate full scale which is 5 v

• P56: 4-20 mA INPUT — in percent of maximum input.

20% = 4 mA, 100% = 20 mA

If a fault lockout (LC) has occurred, view the fault history in

P50 to find the last fault. Once P50 is displayed, use the arrow

keys to scroll through the last 8 faults. Any current faults or fault

codes from the fault history can be analyzed using the MMV

Fault Codes table.

The drive is programmed to automatically restart after a

fault and will attempt to restart three times after a fault (the

drive will not restart after CF, cF, GF, F1, F2-F9, or Fo faults).

If all three restart attempts are unsuccessful, the drive will trip

into FAULT LOCKOUT (LC), which requires a manual reset.

To disable automatic control mode and enter manual speed

control mode:

1. Change P05 to ‘01- keypad’.

2. Push UP and DOWN arrow key to set manual speed.

3. Set P05 to proper value to restore automatic control

according to MMV Configuration table.

To provide manual start/stop control:

With power removed from VFD, remove start command

jumper and install a switch between the appropriate start termi-

nals as required.

It is strongly recommended that the user NOT change

any programming without consulting Carrier service

personnel. Unit damage may occur from improper

programming.

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