Motormaster; High-Efficiency Variable Condenser Fans; 30Rap011-060 With Greenspeed ® Intelligence; Fan Drive Operation - Carrier AquaSnap 30RAP011-060 Controls, Start-Up, Operation, Service, And Troubleshooting

MOTORMASTER

V OPTION
®
The Motormaster V controller is standard on 30RAP010 and 015
size units. For all other standard (non-Greenspeed/HEVCF) units
that need low-ambient operation, the lead fan on a circuit can be
equipped with the Motormaster V head pressure controller option
or accessory. The controller is energized with the first fan stage
and adjusts fan speed to maintain a SCT of 72°F (22.2°C). The
first stage of fan operation is controlled by the Motormaster V
controller. Refer to Fig. 30 for condenser fan layout information.
The Motormaster is configured in Motormaster Select (Configu-
ration  MM  MMR.S=1(LOW AMBIENT)).

High-Efficiency Variable Condenser Fans

30RAP011-060 WITH GREENSPEED
This option controls the speed of all fans for improvement in part
load efficiency and sound levels. All fans run at the same speed.
High-Efficiency Variable Condenser Fans (HEVCF) is standard
on 30RAP011 and 016 size units; it is not available on sizes
30RAP010 and 015. HEVCF is configured in Motormaster Select
(Configuration  MM  MMR.S=2 (GREENSPEED)).
For the HEVCF option, the following parameters should also be
configured from the factory exactly as shown in Table 15.
Table 15 — HECVF Configuration
UNIT VOLTAGE VOLTS (Configuration
575-3-60
380-3-60
208/230-3-60
460-3-60
380/415-3-50
Unit Fan Type Fan Poles (Configuration
Low Sound Fan
Metal Fan

FAN DRIVE OPERATION

The HEVCF option uses Danfoss VLT 102 variable frequency
drives. Drives are connected to the LEN communication bus.
Fan speed is determined by the chiller controller and communi-
cated to the drive. The drive must be set at Auto On mode.
Fan speed is controlled to maintain SCT set point. The set point is
calculated from conditions and adjusted to the most efficient oper-
ating point.
Drive parameters are set by the chiller control each time the unit
power is cycled with the exception of the drive address. The drive
address is set at the factory to 184 at Drive Parameter 8-31, but
will have to be configured in case of drive replacement. If the
drive address is not set correctly, the control would display Alarm
A179.
The address is configured using the display on the drive. See drive
manual for detailed instructions. Once the address is set, the power
is cycled to reset all other parameters in the drive. Other parame-
ters are listed in Tables 16 and 17 for reference. Drive must be in
"Auto" mode to operate. Push the "Auto" button at the bottom of
the drive; the light above it will be on.
The drive front cover is secured by a T-20 screw; the nominal
torque is 18 inch-pounds (2 N
wiring diagrams for all wiring requirements. Note the shield from
the LEN cable shall be attached to VFD ground.
INTELLIGENCE
®
 
Unit VLTS)
575
380
208 or 230
460
400
 
Unit F.POL)
8
6
m). Refer to the power and control

Fan motor troubleshooting should be done at the main control
box. Disconnect power from unit. All fan motors are connected to
Terminal Block 2. Disconnect each fan cable and check resistance
of motor. An open or short reading between phases or a phase and
ground could signify a failed fan motor. Verify reading at motor
before replacing. Reconnect wires using label coding L1, L2, and
L3. Replace main control box cover, and power up the unit to test
fan operation.
Drive alarms are shown on the chiller controls as A179, A412, and
A413. Refer to Alarms and Alerts section starting on page 92 for a
complete list of alarms and the common alarms with possible
causes. For more details see the drive manual supplied with the
chiller.
Drives and motors are protected by fuses for short circuit protec-
tion. See the Service Test section for details. Fan motor overload
protection is provided by an overload device internal to the motor.
The motor overload responds to a combination of temperature and
current. On overload condition, the device breaks all 3 phases to
the motor. It will reset automatically once the motor temperature
cools.
Table 16 — High-Efficiency Fan Drive Parameters
PARAMETER DESCRIPTION
0-02 Motor Speed Unit
1-03 Torque characteristic
1-73 Flying Restart
1-80 Function at Stop
1-90 Motor Temp Protection
1-91 Motor External Fan
1-93 Thermistor SRC
3-02 Min Reference [Hz]
3-03 Max Reference [Hz]
3-13 Type Reference
3-15 SRC REF#1
3-16 SRC REF#2
3-41 Ramp Up
3-42 Ramp Down
4-10 Motor Speed Direction
4-12 Motor Speed Low Limit [Hz]
4-14 Motor Speed High Limit [Hz]
4-16 Torque Limit [%]
4-18 Current Limit [%]
4-19 Max Output [Hz]
5-12 Digital Input 27
14-01 Switching Frequency [4KHz]
14-03 OverModulation
14-40 VT Level Zero Mag Level
14-60 Function at Overtemp
14-61 Function at Inverter Overload
8-01 Control Site
8-02 Control Source
8-03 Control Timeout
8-04 Control Timeout Function
8-05 Function at Timeout End
8-10 Control Profile
8-30 Protocol
8-31 Address
8-32 Baud Rate
8-33 Parity/Stop Bit
8-34 Estimated Cycle Time
8-37 Max Intercharacter delay
37
SETTING
1 = Hz
1 = Variable Torque
1 = Yes
0 = Coast
0 = No
0 = No
0 = No
1
60
0
1 = AI#53
0 = No
10 = 10s
10 = 10s
2 = Both
5
61
150
110
61
0 = No Operation
6 = 4KHz
1 = Yes
66
1 = Derate
1 = Derate
2 = Digital and Control Word
1 = FC port=RS485
20S
2 = Stop
1= Resume setup
0=FC Profile
20=LEN
184
4=38400
2=No parity, 1 stop bit
0 msec
5 msec