ECM Overview and Setup
UNT-SVX07E-EN 99
Table 42. Configuration settings of the motor control board for fan coil and cabinet heater units
Description on
Unit Label
User
Interface
Name
Typical User
Interface
Value Description
Note: These notes are provided for reference only,
and the motor control board label must be
used as the ultimate guide for setting up an
motor control board on specific units.
Mtr 1 High Spd
Sets the high-speed rpm for Motor 1.
Do not exceed 2300 rpm.
Mtr 1 Med Spd
Sets the medium-speed rpm for Motor 1.
Mtr 1 Low Spd
Sets the low-speed rpm for Motor 1.
Do not set under 600 rpm.
EHStg1 Mtr1 Spd
Assigns an rpm to be associated with a call for
1
st
stage electric heat, for Motor 1 (only on units
equipped with electric heat).
,
,
,
settings are
locked out on units with electric heat.
EH Stg 2 Mtr 1 Spd
Assigns an rpm to be associated with a call for
2
nd
stage electric heat, for Motor 1 (only on
electric heat equipped units).
AI High Spd Mtr 1
Sets the maximum rpm for Motor 1 for the
maximum input value of the analog input.
Analog inputs below the
setting will be
rejected.
AI Low Spd Mtr 1
Sets the minimum turn-on rpm for Motor 1,
when the analog input becomes active.
Mtr 2 Hgh Spd
Sets the high-speed rpm for Motor 2.
Blower coils have only one motor.
Mtr 2 Med Spd
Sets the medium-speed rpm for Motor 2.
Mtr 2 Low Spd
Sets the low-speed rpm for Motor 2.
EHStg1 Mtr2 Spd
Assigns an rpm to be associated with a call for
1
st
stage electric heat, for Motor 2 (only on
electric heat equipped units).
If the unit has only one motor, all seven speed
settings for the second motor
(
,
,
,
,
,
,
) should be set to zero.
EH Stg 2 Mtr 2 Spd
Assigns an rpm to be associated with a call for
2
nd
stage electric heat, for Motor 2 (only on
electric heat equipped units).
AI High Spd Mtr 2
Sets the maximum rpm for Motor 2 for the
maximum input value of the analog input.
AI Low Spd Mtr 2
Sets the minimum turn-on rpm for Motor 2,
when the analog input becomes active.
Op Mode Mtr 1
Sets the operational mode for Motor 1.
Must be set to
for blower coil units.
Op Mode Mtr 2
Sets the operational mode for Motor 2.
Must be set to
for blower coil units.
Mtr 1 Out Format
Sets the interface type for Motor 1.
Must be set to
for blower coil units.
Mtr 2 Out Format
Sets the interface type for Motor 2
Must be set to
for blower coil units.
Mtr 1/2 PWM Freq.
Sets the PWM frequency, for cases when the
PWM outputs are used.
On blower coil units, the
must not be
changed.
Mtr 1 PWM Volt
Sets the PWM voltage, for cases when the PWM
outputs are used.
This setting must NOT be changed, as damage to
the motor may occur!
Mtr 2 PWM Volt
Sets the PWM voltage, for cases when the PWM
outputs are used.
This setting must NOT be changed, as damage to
the motor may occur!
Mt1 Hgh PWM Lt
Sets the maximum output percentage that the
controller will request from Motor 1.
This envelope protection value should not be
altered.
Mt1 Low PWM Lt
.
Sets the minimum maximum output percentage
that the controller will request from Motor 1.
This envelope protection value should not be
altered.
Mt2 Hgh PWM Lt
Sets the maximum output percentage that the
controller will request from Motor 2.
This envelope protection value should not be
altered.
Mt2 Low PWM Lt
.
Sets the minimum maximum output percentage
that the controller will request from Motor 2.
This envelope protection value should not be
altered.
Mt1 Ovspd RPM
Selects the rpm above which the Motor 1 will be
assumed to be in an overspeed condition and will
need to be shut down.
This envelope protection value should not be
altered.
Mt2 Ovspd RPM
Selects the rpm above which the Motor 2 will be
assumed to be in an overspeed condition and will
need to be shut down.
This envelope protection value should not be
altered.
Fan Proving Fct
Selects which mode should be assigned to the
Binary output circuit, depending on unit type.
This setting has to be correct for proper unit
operation of electric heat and changeover units.
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