Carrier Weathermaster 48P2030-100 - Appendix D - Vfd Information

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APPENDIX D — VFD INFORMATION
On units equipped with optional supply fan and/or exhaust fan
VFDs, the fan speed is controlled by a 3-phase VFD. The sup-
ply fan VFD is located in the supply fan section (030-050 size
units) or mixing box section (055-100 size units) behind an ac-
cess door. For 075-100 size units with optional high-capacity
power exhaust or return fan, the exhaust fan VFD is located in
the mixing box section behind an access door.
The P Series units use ABB VFDs. The VFDs communicate to
the ComfortLink MBB over the local equipment network
(LEN). The VFD speed is controlled directly by the Com-
fortLink controls over the LEN. The interface wiring for the
VFDs is shown in Fig. A and the terminal designations are
shown in Table AA. The VFD has a keypad display panel that
can be used for Service Diagnostics and setting the initial VFD
parameters required to allow the VFD to communicate on the
LEN. Additional VFD parameters are set by the ComfortLink
controls and sent to the VFD over the LEN at power up of the
VFD. The VFD faults can be reset with the VFD keypad or
through the ComfortLink controls (Alarms
 R.CUR =Yes).
Table AB outlines the VFD parameters required to initialize
communication over the ComfortLink LEN. These parameters
must be set correctly for any communications to occur. These
parameters come preset from the factory. If the VFD is re-
placed, these parameters must be set at the initial power up of
the drive. This can be accomplished by running the Carrier As-
sistant through the VFD keypad (see START UP WITH THE
CARRIER ASSISSTANT section), or setting each of the pa-
rameters individually.
After the parameters in Table AB have been set, the Com-
fortLink controls configure the additional parameters listed in
Tables AC and AD automatically. These parameter configura-
tions are sent to the VFD at every power up. The parameters
listed in Table AC have corresponding ComfortLink configura-
tions (Configuration
 S.VFD and Configuration  E.VFD).
The parameters in Table AD are hard-coded to be set as listed.
After configuration Tables AC and AD have been sent to the
VFD, the drive continues to send and receive information from
the ComfortLink controls. This information is outlined in Ta-
bles AE and AF. Table AE lists the information the VFD sends
to the ComfortLink controls, and Table AF lists the information
the ComfortLink controls send to the VFD. These tables are
updated at every scan the ComfortLink controls perform of the
LEN. This occurs approximately once every second.
Table AA — VFD Terminal Designations
Fig. A — VFD Wiring
TERMINAL FUNCTION
U1 Three-Phase Main Circuit Input Power Supply
V1
W1
U2 Three-Phase AC Output to Motor, 0 V to Maximum Input Voltage Level
V2
W2
X1-11 (GND) Factory-supplied jumper
X1-12 (D-COM)
X1-10 (+24 V) Factory-supplied jumper
X1-13 (DI-1)
X1-10 (+24 V) Start Enable 1 (Factory-supplied jumper). When opened the drive goes to emergency stop.
X1-16 (DI-4)
X1-28 (SCR) Factory wired for local equipment network LEN communication
X1-29 (B+)
X1-30 (B-)
X1-31 (AGND)
X1-32 (SCR)
+24 V
GND
DCOM
DI-1 DI-2 DI-3 DI-4 DI-5 DI-6
SCR
B(+)
A(-)
AGND
SCR
10 11 12 13 14 15 16 17 18 28 29 30 31 32
LEN connection from ComfortLink
Terminal X1