Carrier Weathermaster 48P2030-100, Управление, пуск, эксплуатация, обслуживание и устранение неисправностей.

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APPENDIX G — OPTIONAL MOTORMASTER
®
V CONTROL
Fig. Q — MMV Control Location — 48/50P090,100 Units
Configure Motormaster ® V Control
The Motormaster V control is configured for proportional inte-
gral (PI) control mode. The Motormaster V control varies the
condenser fan motor speed to maintain a set point of 320 psig
liquid line pressure in response to a 0 to 5 vdc feedback signal
from the liquid line pressure transducer. No additional pro-
gramming is required. See Table AQ. Note that the pressure
transducer must be attached for proper configuration.
Table AQ — Configuration Table
The following Comfort Link control configurations must be set
when using a Motormaster V device:
• Configuration

COOL

M.M. = YES
• Configuration

COOL

LLAG = CIRCUIT A (size 030-
060 units only)
Test Motormaster V Control
To test the control and motor in the test mode, run compressor
no. 1. The Motormaster V electronic control adjusts the fan
speed based on the liquid line pressure input. Ensure that fans
are rotating clockwise (as viewed from above). If rotation is
backward, lock out all power, then swap 2 leads AFTER the
Motormaster V control.
START-UP
The Motormaster V electronic control will be powered up as
long as unit voltage is present. When the system calls for cool-
ing, the Motormaster relay (MMR) will be energized to initiate
the start-up sequence for the Motormaster V electronic control.
The LED (light-emitting diode) will display the speed of the mo-
tor. The display range will be 8 to 60 Hz. The Motormaster V
electronic control will start the condenser fan when the compres-
sor engages. The control will adjust the fan speed to maintain ap-
proximately 320 psig. Above that pressure, the fan should oper-
ate at full speed.
For size 030-060 units, the Motormaster V control uses a 0 to
5 vdc signal input from a pressure transducer attached to the
liquid line service valve gage port on circuit A.
For size 070-100 units, two Motormaster V devices are used,
one for each circuit. The circuit A Motormaster V control uses a
0 to 5 vdc signal input from a pressure transducer attached to the
liquid line service valve gage port on circuit A. The circuit B
Motormaster V control uses a 0 to 5 vdc signal input from a
pressure transducer attached to the liquid line service valve gage
port on circuit B.
The pressure transducer(s) are connected to terminals 2, 5 and
6 on the controller. See Fig. R. The controller is configured by
jumper wires and sensor input types. No field programming is
required. If controller does not function properly, the informa-
tion provided in the Troubleshooting section can be used to
program and troubleshoot the drive.
MOTORMA S TER A
CONTROL
MOTORMA S TER B
CONTROL
NOMINAL
VOLTAGE
(V-Ph-Hz)
MODE
CONTROL INPUT
(Pin 5)
START
CONTACTS
230-3-60
460-3-60
575-3-60
1
Internal PI control,
0-5V feedback
TB 1,2
208-3-60
380-3-60
2 TB 13A,2
400-3-50 4 TB 13C,2