Carrier CRLOWAMB033A00, MOTORMASTER 48/50P2, CRLOWAMB034A00, CRLOWAMB035A00, CRLOWAMB036A00 Installation Instructions Manual

Installation Instructions

Part Numbers: CRLOWAMB033A00 THROUGH CRLOWAMB038A00

CONTENTS

Page

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . 1

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

Pre-Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Step 1 — Install Field-Fabricated Wind Baffles . . . 3
Step 2 — Mounting and Electrical Connections

for Motormaster

Step 3 — Configure Motormaster V Control . . . . . 11

Step 4 — Test Motormaster V Control . . . . . . . . . . . 11

START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-13

TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . 13-15

SAFETY CONSIDERATIONS

Installation, start-up, and servicing of this equipment can be
hazardous due to system pressures, electrical components, and
equipment location (roofs, elevated structures, etc.).

Only trained, qualified installers and service technicians
should install, start up, and service this equipment.

When working on this equipment, observe precautions in
the literature and on tags, stickers, and labels attached to the
equipment and any other safety precautions that may apply.

®

V Control . . . . . . . . . . . . . . . . . . . . 5

48/50P2,P3,P4,P5030-100

Low Ambient Operation

MOTORMASTER® V Control Accessory

50/60 Hz

WARNING

Open all remote disconnects before servicing this equip­ment. Electrical shock could result in personal injury.

GENERAL

This book contains instructions for the installation, start-up,
and service of the Motormaster V (MMV) control on
48/50P030-100 units.

The Motormaster V control is a motor speed control device
which adjusts condenser fan motor speed in response to varying
liquid refrigerant pressure. A properly applied Motormaster V
control extends the operating range of air-conditioning systems
and permits operation at lower outdoor ambient temperatures.

To operate these units at very low ambient temperatures, Mo­tormaster V controls (Fig. 1) must be added. Field-fabricated and
installed wind baffles are also required for units in areas with pre­vailing winds of more than 5 mph (8 kph) and where tempera­tures drop below 32 F (0° C). The Motormaster V control permits
operation of the unit to an ambient temperature of –20 F (–29 C).
The control regulates the speed of one or two 3-phase fan motors
depending on unit size. Replacement of the fan motor on most
units is not necessary since the control is compatible with the
factory-installed fan motors. To verify that unit fan motors are
compatible with the control see Table 1.

See Tables 2-4 for the Motormaster V control accessory pack­age usage and contents. Field wiring of control is required.

Table 1 — Replacement Motor Part Numbers

48/50P2,P3,P4,P5 UNIT SIZE VOLTAGE ACCESSORY PART NUMBER

208/230-3-60 Not Required, Std Unit Motor

035

030, 040-060

070

075-100

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Catalog No. 04-53480070-01 Printed in U.S.A. Form 48/50P-2SI Pg 1 9-09 Replaces: New

400-3-50, 460-3-60 Not Required, Std Unit Motor

575-3-60 Not Required, Std Unit Motor

380-3-60 HD56AK380

208/230-3-60 HD52AK002

400-3-50, 460-3-60 HD52AK002

575-3-60 Not Required, Std Unit Motor

380-3-60 Not Required, Std Unit Motor

208/230-3-60 HD52AK002 (2 Required)

400-3-50, 460-3-60 HD52AK002 (2 Required)

575-3-60 Not Required, Std Unit Motor

380-3-60 Not Required, Std Unit Motor

208/230-3-60 Not Available

400-3-50, 460-3-60 HD52AK002 (2 Required)

575-3-60 Not Required, Std Unit Motor

380-3-60 Not Available

Table 2 — Motormaster® V Control Package Contents — 48/50P030-060 Units

256

2

12 13A

13B

13C

1

2

3

TO MOTOR(S)

BLK

YEL

BLU

FROM FUSE BLOCK

B

TO PRESSURE
TRANSDUCER

12561

12

2 14 13A 13B 13C 15 25 2 30 31 TXA

TXB

COM

+5V

TERMINAL

BLOCK

L1

L2

L3

T1

T2

T3

B-

B+

PRESSURE

TRANSDUCER

Fig. 1 — Motormaster® V Control

NOTE: Wire colors for MMPT:

2 — BLACK (A)
5 — GREEN (C)
6 — RED (B)

ITEM CRLOWAMB033A00 CRLOWAMB034A00 CRLOWAMB035A00
Connector (
Connector (1-in.) HW60HH006
Controller, 230 V 2 Hp HR46TN001 — —
Controller, 460 V 2 Hp — HR46TN002 —
Controller, 575 V 2 Hp — — HR46TN003
Enclosure 30RA500381
Enclosure Cover 30RA500519
Enclosure Mounting Bracket 50EJ500656
Fan Relay HN61KK055
Relay Base HN79KK035
Fuse Block HY11UT035
Fuse 15A, KTK-R, Class CC — HY10KB151 (3) HY10KB151 (3)
Fuse 20A, KTK-R, Class CC HY10KB200 (3) — —
Harness Assembly 48ZZ401971
Harness Assembly 48EJ402454
Harness Assembly 48ZZ402001
Label 48ZZ502002
Transducer HK05ZZ001
Transducer Harness 48EJ403240
Varnish Cloth (Large) 48DA510141
Varnish Cloth (Small) 38C24601
Wire Tie HY76TB123 (12)
Wire Tie HY76TB045 (5)
Wire, 16 Gage 72 in. Long WHT (1), GRY (1)

1

/2-in.) HW60EA001

2

Table 3 — Motormaster V Control Package Contents — 48/50P070-100 Units

ITEM CRLOWAMB036A00 CRLOWAMB037A00 CRLOWAMB038A00

1

Connector (
Connector (1-in.) HW60HH006 (2)
Controller, 230 V 2 Hp HR46TN001 (2) — —
Controller, 460 V 2 Hp — HR46TN002 (2) —
Controller, 575 V 2 Hp — — HR46TN003 (2)
Enclosure 30RA500381 (2)
Enclosure Cover 30RA500519 (2)
Enclosure Mounting Bracket 50EJ500656 (2)
Fan Relay HN61KK055 (2)
Relay Base HN79KK035 (2)
Fuse Block HY11UT035 (2)
Fuse 15A, KTK-R, Class CC — HY10KB151 (6) HY10KB151 (6)
Fuse 20A, KTK-R, Class CC HY10KB200 (6) — —
Harness Assembly 48ZZ401971 (2)
Harness Assembly 48EJ402454 (2)
Harness Assembly 48ZZ402001 (2)
Label 48ZZ502002
Transducer HK05ZZ001 (2)
Transducer Harness 48EJ403240 (2)
Varnish Cloth (Large) 48DA510141 (2)
Varnish Cloth (Small) 38C24601 (2)
Wire Tie HY76TB123 (6)
Wire Tie HY76TB045 (2)
Wire, 16 Gage 72 in. Long WHT (2), GRY (2)

/2-in.) HW60EA001 (2)

Table 4 — Motormaster V Control Package Usage

UNIT VOLTAGE ITEM DESCRIPTION

48/50P030-060

48/50P070-100

INSTALLATION

Pre-Installation —

package before installing. File a claim with the shipper if there
is shipping damage or if a part is missing.

Inspect the contents of this accessory

Step 1 — Install Field-Fabricated Wind Baffles

WARNING

To avoid the possibility of electrical shock, open all discon­nects before installing or servicing this accessory.

On size 040-060 units, in areas with prevailing winds of
more than 5 mph (8 kph) and where temperatures drop below
32 F (0° C), wind baffles must be field fabricated to ensure

208/230 CRLOWAMB033A00

380, 400, 460 CRLOWAMB034A00

575 CRLOWAMB035A00

208/230 CRLOWAMB036A00

380, 400, 460 CRLOWAMB037A00

575 CRLOWAMB038A00

proper cooling cycle operation at low-ambient temperatures
with Motormaster V controls. Wind baffles are not needed on
size 030, 035, and 070-100 units. See Fig. 2 for baffle details.
Use 20-gage (1 mm) galvanized sheet metal, or similar corro­sion-resistant material for the baffles. Use field-supplied screws
to attach baffles to unit. Screws should be
eter or larger. Screws should not be more than

1

/4-in. (6.3 mm) diam-

1

/2-inch in length.

Drill required screw holes for mounting baffles.

CAUTION

To avoid damage to refrigerant coils, electrical compo­nents, and wiring use extreme care when drilling screw
holes and screwing in fasteners.

3

WIND BAFFLE

Fig. 2 — Wind Baffle Details

NOTE: 48/50P030, 035, and 070-100 units do not require
baffles.

UNIT SIZE QUANTITY

DIMENSION “A”

in. mm
030,035 Not Used — —
040-060 2 78.125 ± 0.125 1984 ± 3
070-100 Not Used — —

BAFFLE INSTALLATION LOCATION (SIZES 050 AND 060 SHOWN)

a48-8561

a48-8560

4

Step 2 — Mounting and Electrical Connec­tions for Motormaster® V Control

WARNING

To avoid possibility of electric shock and personal
injury, open and tag all electrical disconnects before
installing or servicing unit.

WARNING

Hazard of electric shock. Wait three minutes after discon­necting incoming power before servicing drive. Capacitors
retain charge after power is removed.

CAUTION

To avoid damage to the small terminals on the Motormas­ter V control, use care when tightening the compression
terminals and use the proper size screwdriver.

CAUTION

DO NOT connect incoming AC power to Motormaster V
output terminals T1, T2, and T3. Severe damage to the con­trol will result.

48/50P030-060 UNITS — For 48/50P030-035 units, the Mo­tormaster controlled outdoor-fan motor (OFM) is the no. 1
OFM (see Fig. 3). The no. 2 OFM is controlled by the Com-
fortlink head pressure control routine.

For 48/50P040 units, the Motormaster controlled outdoor­fan motor (OFM) is the no. 3 OFM (see Fig. 3). The no. 1 and 2
OFMs are controlled by the Comfortlink head pressure control
routine.

For 48/50P050-060 units, the Motormaster controlled out­door-fan motor (OFM) is the no. 1 OFM (see Fig. 3). The no. 2,
3, and 4 OFMs are controlled by the Comfortlink head pressure
control routine.

Use the following procedure to mount and connect the
MMV controllers to these units:

1. Disconnect power to the unit. Lockout and tag power dis­connect.

2. Remove control box covers.

3. For size 030-035 units, remove panel from condenser
section on OFM 1 side of the unit in order to gain access
to the outdoor fan section. See Fig. 4. For size 040-060
units, remove panel above control box as shown in Fig. 5
and 6.

4. Mount accessory fuse block HY11UT035 and fan relay
base HN79KK035 inside control box as shown in Fig. 7.
Secure components with ½-in. sheet metal screws.

a. Insert fuses into fuse blocks and relays into relay

bases.

b. Install harness 48EJ402454 from load side of CCB

(control circuit breaker terminals 21, 22, 23) to line
side of MMF (Motormaster V fuse block) as
shown in Fig. 8. Note that it may be easier to pick
up the load side of CCB from the ¼-in. male quick
connect terminals on the line side (terminals 11,
12, 13) of the OFC contactors (see power sche­matic on control box door).

c. Connect FR (fan relay) coil to OFC1 coil using the

72-in. long 16 gage white and gray wires (stripped
end goes to FR) as shown in Fig. 8.

5. Mount the MMV controller enclosure 30RA500381 on
the bulkhead of the unit inside the outdoor fan section, as
shown in Fig. 4-6, using the mounting brackets
50EJ500656 installed on the enclosure. Remove the en­closure cover and install the ½-in. HW60EA001 and 1-in.
HW60HH006 connectors in the holes in the lower right
hand side of the enclosure.

6. Connect transducer HK05ZZ001 to the liquid line service
Schrader port of refrigerant Circuit A. Plug transducer ca­ble 48EJ403240 into transducer. Run cable to the MMV
enclosure, as shown in Fig. 4-6.

Run MMPT (Motormaster V pressure transducer) cable
through ½-in. connector of MMV enclosure (do not tight­en connector screws at this time). Connect red, green, and
black wires to MMV terminals 6, 5, and 2 as shown in
Fig. 8. Terminate drain wire of transducer cables under
one of the lower MMV mounting screws.

7. Make remaining electrical connections to MMV (see
Fig. 8).

a. In main control box, disconnect black, red, blue,

and green wires from load side (terminals 21, 22,

23) of OFC1 (sizes 030-035, 050-060) contactor or
OFC 3 (size 040) (label cable from OFC1 or OFC3
(size 040) as OFM1 or OFM3 (size 040). Pull
wires out through the hole in the bottom of the
control box and run them up the corner post to the
opening of the cable tray on the side of the control
box, as shown in Fig. 4-6. Run the cable through
the wire tray to the MMV enclosures.

b. Run the OFM1/OFC3 (040) cable through the 1-in.

connector of the MMV enclosure (do not tighten
connector screws at this time). Remove ring termi­nals from black, red, and blue wires and strip insu­lation back 3/8-in. Connect black, red, and blue
wires to MMV terminals T1, T2, and T3. Connect
green ground wire to MMV ground screw.

c. In the main control box connect Motormaster VFD

(variable frequency drive) harness 48ZZ401971 to
the load side of the MMF (label the opposite end of
this harness as MMF). Run the harness along the
bottom of the control box and out through the hole
that the OFM harness was in. Pull the harness out
through the hole in the bottom of the control box
and run it through the opening of the cable tray (in
the same manner as the OFM harnesses).

d. Run the MMF cable through 1-in. connector of the

MMV enclosure (do not tighten connector screws
at this time). Connect L1, L2, and L3 wires to
MMV terminals L1, L2, and L3. Connect green
ground wire to MMV ground screw. Place 1 large
varnish cloth 48DA510141 around both cables at
the point they enter the 1-in. connector. Tighten
down connector screws being careful not to dam­age the cables.

e. In the main control box connect one Motormaster

VFD harness 48ZZ402001 to the NO (normally
open) contact of the FR (see Fig. 8). Run the har­nesses along the bottom of the control box and out
through the hole that the OFM harness was in. Pull
the harness out through the hole in the bottom of
the control box and run it through the opening of
the cable (in the same manner as the OFM
harness).

5

UNIT

48/50P

FAN ARRANGEMENT FAN NO. NORMAL CONTROL

030,035

1

MMV-A

2

Controlled by the ComfortLink™ head pressure
control routine

040

1

Controlled by the ComfortLink head pressure
control routine

2

3

MMV-A

050-060

1 MMV-A
2 Controlled by the ComfortLink head pressure

control routine

3
4

070,075

1

MMV-B

2

Controlled by the ComfortLink head pressure
control routine

3

MMV-A

4

Controlled by the ComfortLink head pressure
control routine

090,100

1

Controlled by the ComfortLink head pressure
control routine

2

MMV-B

3

Controlled by the ComfortLink head pressure
control routine

4

5

6

MMV-A

Control Box

1

2

Control Box

1

23

24

Control Box

1

24

6

53

Fig. 3 — Fan Control

REMOVE PANEL

RUN ELECTRICAL HARNESSES UP THE SIDE
OF THE UNIT IN THE SPACE BETWEEN THE
CORNER POST AND THE CONTROL BOX.
ROUTE THE WIRING INTO THE WIRE TRAY,
THEN RUN APPROPRIATE WIRES TO OFM 1
AND MOTORMASTER CONTROL

MOTORMASTER
CONTROL

TRANSDUCER
HARNESS FROM
CIRCUIT A LIQUID LINE
TRANSDUCER TO MMV

Fig. 4 — MMV Control Mounting — 48/50P030,035 Units

a48-8562

Control Box

1

3

4

2

Control Box

1

3

6

REMOVE PANEL

RUN ELECTRICAL HARNESSES UP THE SIDE
OF THE UNIT IN THE SPACE BETWEEN THE
CORNER POST AND THE CONTROL BOX, THEN
ALONGSIDE THE WIRE TRAY. ROUTE
APPROPRIATE WIRES TO MOTORMASTER AND
OFM 3

MOTORMASTER
CONTROL

RUN TRANSDUCER HARNESS FROM CIRCUIT A
TRANSDUCER TO MOTORMASTER ALONG THE LENGTH OF
THE BOTTOM OF THE CONDENSER COIL THEN UP INTO
MOTORMASTER. RUN THE WIRES ALONG THE OUTSIDE
OF THE COIL TRAY.

Fig. 5 — MMV Control Mounting — 48/50P040 Units

a48-8563

RUN ELECTRICAL HARNESSES UP THE SIDE OF THE

MOTORMASTER
CONTROL

Fig. 6 — MMV Control Mounting — 48/50P050-060 Units

a48-8564

UNIT IN THE SPACE BETWEEN THE CORNER POST
AND THE CONTROL BOX, THEN ALONGSIDE THE WIRE
TRAY. ROUTE APPROPRIATE WIRES TO
MOTORMASTER AND OFM 1

RUN TRANSDUCER HARNESS FROM CIRCUIT A
TRANSDUCER TO MOTORMASTER ALONG THE
LENGTH OF THE BOTTOM OF THE CONDENSER COIL
THEN UP INTO MOTORMASTER. RUN THE WIRES
ALONG THE OUTSIDE OF THE COIL TRAY.

REMOVE PANEL

7

MMF-A MMF-B FR-A FR-B

Fig. 7 — 48/50P Control Box Details

LEGEND

FR — Fan Relay
MMF — Motormaster V Fuse Block

a48-8565

OFM-1 (030,035,050-060)
OFM-3 (040)

MMV-A

L1

L2

L3

T1

T2

T3

B-

B+

BLK

BLK

BLU
YEL

1

2

5

6

11

12

2

14

13A

13B

13C 15

5

9

MMPT

230-3-60 SHOWN.
REFER TO TABLE 4 FOR
ALTERNATE VOLTAGE
CONNECTIONS

FR-A

OFC1

13

14

C1

C2

ADD FAN RELAY (FR)

IN PARALLEL WITH OFC1

CCB

MM-F

BLU

YEL

A

B

C

TB

BLU

RED

BLK

GRN/YEL, DRAIN

RED

BLK

BLU

RED

BLK

GRY

WHT

11 12

13

22

2321

FR-A

Fig. 8 — Motormaster® V Accessory Wiring — 48/50P030-060 Units

LEGEND

CCB — Control Circuit Breaker
FR — Fan Relay
MM-F — Motormaster V Fuse Block
MMPT — Motormaster Pressure Transducer
MMV — Motormaster V Control
OFC — Outdoor-Fan Contactor
OFM — Outdoor-Fan Motor
TB — Terminal Block

NOTE: Wire colors for MMPT:

2 — BLACK (A)
5 — GREEN (C)
6 — RED (B)

a48-8566

8

f. Run the FR cable through the

1

/2-in. connector of

the MMV enclosure (do not tighten connector
screws at this time). Connect black wire to MMV
terminal 2 and red wire to MMV terminal 1, 13A,
or 13C (see Table 4). Place 1 small varnish cloth
38C24601 around both cables at the point they
enter the

1

/2-in. connector. Tighten down connector

screws being careful not to damage the cables.

8. Bundle excess wire and dress harnesses with wire ties.

9. Re-attach control box, MMV enclosure, and cable tray
covers.

48/50P070-100 UNITS — For 48/50P070-075 units, two
Motormaster controls are used to control two independent out­door-fan motors (OFM). The refrigerant circuit-A Motormas-

®

ter

controlled OFM is the no. 3 OFM. The refrigerant circuit­B Motormaster controlled OFM is the no. 1 OFM (see Fig. 3).
The no. 2 and 4 OFMs are controlled by the ComfortLink™
head pressure control routine.

For 48/50P090-100 units, the two Motormaster controls are
used to control two independent outdoor-fan motors. The re­frigerant circuit-A Motormaster controlled OFM is the no. 6
OFM. The refrigerant circuit-B Motormaster controlled OFM
is the no. 2 OFM (see Fig. 3). The no. 1, 3, 4, and 5 OFMs are
controlled by the ComfortLink head pressure control routine.

Use the following procedure to mount and connect the
MMV controllers to this unit:

1. Disconnect power to the unit. Lockout and tag power dis­connect.

2. Remove control box covers.

3. Remove fan decks to gain access to each circuit’s respec­tive Motormaster controlled OFM, as shown in Fig. 9 and

10.

4. Mount accessory fuse blocks HY11UT035 (label 1 as
MMF-A and the other as MMF-B) and fan relay bases
HN79KK035 (label 1 as FR-A and the other as FR-B) in­side control box as shown in Fig. 7. Secure components
with ½-in. sheet metal screws.

a. Insert fuses into fuse blocks and relays into relay

bases.

b. Install harnesses 48EJ402454 from load side of

CCB (control circuit breaker terminals 21, 22, 23)
to line side of MMF-A and MMF-B fuse blocks as
shown in Fig. 11. Note that it may be easier to
pickup the load side of CCB from the ¼-in. male
quick connect terminals on the line side (terminals
11, 12, 13) of the OFC contactors (see power sche­matic on control box door).

c. For 070 and 075 units:

Connect FR-A coil to OFC3 coil and FR-B coil to
OFC1 coil using the 72 in. long 16 gage white and
gray wires (stripped end goes to FR) as shown in
Fig. 11.

For 090 and 100 units:

Connect FR-A coil to OFC3 coil and FR-B coil to
OFC2 coil using the 72 in. long 16 gage white and
gray wires (stripped end goes to FR) as shown in
Fig. 11.

5. Mount the MMV controller enclosures 30RA500381on
the bulkhead, as shown in Fig. 9 (sizes 070 and 075) and
Fig. 10. (sizes 090 and 100) using the mounting brackets
50EJ500656 installed on the enclosures (label 1 as MMV­A and the other as MMV-B). Remove the enclosure cov­ers and install the ½-in. HW60EA001 and 1-in.
HW60HH006 connectors in the holes in the lower right
hand side of the enclosures.

6. Connect transducers HK05ZZ001 to the liquid line ser­vice Schrader ports, located under the V-coils of the con­denser fan sections, of refrigerant circuit A and B. Circuit
A is the one closest to the Indoor Fan Motor section, and
circuit B is the one closest to the control box, (label cir­cuit A transducer as MMPT-A and circuit B transducer as
MMPT-B).

7. Plug transducer cables 48EJ403240 into transducers (la­bel stripped end of circuit A cable as MMPT-A and the
stripped end of circuit B cable as MMPT-B). Run cables
along inside of unit base rail and up the corner post to the
MMV enclosures, as shown in Fig. 9 and 10.

8. Run MMPT-A cable through
A enclosure, and MMPT-B cable through

1

/2-in. connector of MMV-

1

/2-in. connec­tor of MMV-B enclosure (do not tighten connector
screws at this time). Connect red, green, and black wires
to MMV-A and MMV-B terminals 6, 5, and 2 as shown
in Fig. 11. Terminate drain wire of transducer cables un­der one of the lower MMV mounting screws.

9. Make remaining electrical connections to MMV-A and
MMV-B (see Fig. 11).

a. For 070 and 075 units:

In the main control box, disconnect black, red,
blue, and green wires from load side (terminals 21,
22, 23) of OFC1 and OFC3 contactors (label cable
from OFC1 as OFM1 and cable from OFC3 as
OFM3). Pull wires out through the hole in the bot­tom of the control box and run them up the corner
post to the opening of the cable tray on the side of
the control box, as shown in Fig. 9. Run the cable
through the wire tray to the MMV enclosures.

Run the OFM1 cable through the 1-in. connector
of the MMV-B enclosure (do not tighten connector
screws at this time). Remove ring terminals from
black, red, and blue wires and strip insulation back
3/8-in. Connect black, red, and blue wires to
MMV-B terminals T1, T2, and T3. Connect green
ground wire to MMV-B ground screw.

Run OFM3 cable through 1-in. connector of
MMV-A enclosure (do not tighten connector
screws at this time). Remove ring terminals from
black, red, and blue wires and strip insulation back

3

/8-inch. Connect black, red, and blue wires to

MMV-A terminals T1, T2, and T3. Connect green
ground wire to MMV-B ground screw.

For 090 and 100 units:

In Main Control box, disconnect black, red, blue,
and green wires from load side (terminals 21, 22,

23) of OFC2 and OFC3 contactors (label cable
from OFC2 as OFM2 and cable from OFC3 as
OFM3). Pull wires out through the hole in the bot­tom of the control box and run them up the corner
post to the opening of the cable tray on the side of
the control box, as shown in Fig. 10. Run the cable
through the wire tray to the MMV enclosures.

Run the OFM2 cable through the 1-in. connector
of the MMV-B enclosure (do not tighten connector
screws at this time). Remove ring terminals from
black, red, and blue wires and strip insulation back

3

/8-in. Connect black, red, and blue wires to MMV­B terminals T1, T2, and T3. Connect green ground
wire to MMV-B ground screw.

Run OFM6 cable through 1-in. connector of
MMV-A enclosure (do not tighten connector
screws at this time). Remove ring terminals from
black, red, and blue wires and strip insulation back
3/8-in. Connect black, red, and blue wires to
MMV-A terminals T1, T2, and T3. Connect green
ground wire to MMV-B ground screw.

9

b. In main control box connect one Motormaster

Fig. 9 — MMV Control Mounting — 48/50P070,075 Units

a48-8567

VFD harness 48ZZ401971 to the load side of
MMF-A (label the opposite end of this harness as
MMF-A) and the other Motormaster VFD har­nesses 48ZZ401971 to the load side of MMF-B
(label the opposite end of this harness as MMF-B).
Run the harnesses along the bottom of the control
box and out through the hole that the OFM har­nesses were in. Pull the harnesses out through the
hole in the bottom of the control box and run them
through the opening of the cable tray (in the same
manner as the OFM harnesses).

c. Run the MMF-A cable through 1-in. connector of

MMV-A enclosure (do not tighten connector
screws at this time). Connect L1, L2, and L3 wires
to MMV-A terminals L1, L2, and L3. Connect
green ground wire to MMV-A ground screw. Place
1 large varnish cloth 48DA510141 around both
cables at the point they enter the 1-in. connector.
Tighten down connector screws being careful not
to damage the cables.

d. Run the MMF-B cable through 1-in. connector of

MMV-B enclosure (do not tighten connector
screws at this time). Connect L1, L2, and L3 wires
to MMV-B terminals L1, L2, and L3. Connect
green ground wire to MMV-B ground screw. Place
the other large varnish cloth 48DA510141 around
both cables at the point they enter the 1-in. connec­tor. Tighten down connector screws being careful
not to damage the cables.

e. In Main Control box connect 1 Motormaster VFD

(variable frequency drive) harness 48ZZ402001 to
the NO (normally open) contact of FR-A (see

Fig. 11) (label the opposite end of this harness as
FR-A) and the other Motormaster VFD harness
48ZZ402001 to the NO contact of FR-B (label the
opposite end of this harness as FR-B). Run the har­nesses along the bottom of the control box and out
through the hole that the OFM harnesses were in.
Pull the harnesses out through the hole in the bot­tom of the control box and run them through the
opening of the cable (in the same manner as the
OFM harnesses).

f. Run the FR-A cable through the

1

/2-in. connector
of the MMV-A enclosure (do not tighten connector
screws at this time). Connect black wire to MMV­A terminal 2 and red wire to MMV-A terminal 1,

13A, or 13C (see Table 4). Place 1 small varnish
cloth 38C24601 around both cables at the point
they enter the

1

/2-in. connector. Tighten down con­nector screws being careful not to damage the
cables.

g. Run the FR-B cable through the

1

/2-in. connector
of the MMV-B enclosure (do not tighten connector
screws at this time). Connect black wire to MMV­B terminal 2 and red wire to MMV-B terminal 1,

13A, or 13C (see Table 4). Place the other small
varnish cloth 38C24601 around both cables at the
point they enter the

1

/2-in. connector. Tighten down
connector screws being careful not to damage the
cables.

10. Bundle excess wire and dress harnesses with wire ties.

11. Reattach control box, MMV enclosure, and cable tray
covers.

ROUTE THROUGH
SNAP BUSHING

MOTORMASTER A
CONTROL

MOTORMASTER B
CONTROL

TRANSDUCER A

TRANSDUCER B

REMOVE PANEL AND
FAN DECKS

RUN ELECTRICAL HARNESSES UP THE SIDE OF THE UNIT IN THE
SPACE BETWEEN THE CORNER POST AND THE CONTROL BOX.
ROUTE WIRES INTO WIRE TRAY AND RUN TO MMV A/B AND
OFM 3/1

10

Step 3 — Configure Motormaster® V Con-

REMOVE TWO FAN DECKS TO
GAIN ACCESS TO ROUTE WIRING TO
OFM 2 AND OFM 6

ROUTE THROUGH
SNAP BUSHING

MOTORMASTER A
CONTROL

MOTORMASTER B
CONTROL

TRANSDUCER A

TRANSDUCER B

RUN ELECTRICAL HARNESSES
UP THE SIDE OF THE UNIT
IN THE SPACE BETWEEN THE
CORNER POST AND THE
CONTROL BOX. ROUTE WIRES
INTO WIRE TRAY AND RUN
TO MMV A/B AND OFM 6/2

REMOVE PANEL

Fig. 10 — MMV Control Mounting — 48/50P090,100 Units

a48-8568

trol — The Motormaster V control is configured for propor-

tional integral (PI) control mode. The Motormaster V varies
the condenser fan motor speedto 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 programming is required. See Table 4. Note that the
pressure transducer must be attached for proper configuration.

Table 4 — Configuration Table

NOMINAL
VOLTAGE

(V-Ph-Hz)

230-3-60
460-3-60
575-3-60

208-3-60
380-3-60

400-3-50 4 TB 13C,2

MODE

1

2 TB 13A,2

CONTROL INPUT

(Pin 5)

Internal PI control,

0-5V feedback

The following ComfortLink control configurations must be

set when using a Motormaster V device:

• Configuration

• Configuration



COOLM.M. = YES



COOLLLAG = CIRCUIT A (size

030-060 units only)

Step 4 — 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,

CONTACTS

lock out all power then swap 2 leads AFTER the Motormaster
V control.

as long as unit voltage is present. When the system calls for
cooling, the fan relay 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 motor. The
display range will be 8 to 60 Hz. The Motormaster V electronic

START

control will start the condenser fan when the compressor en­gages. The control will adjust the fan speed to maintain ap­proximately 320 psig. Above that pressure, the fan should op-

TB 1,2

erate at full speed.

to 5 vdc signal input from a pressure transducer attached to the
liquid line service valve gage port on circuit A.

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.

and 6 on the controller. The controller is configured by jumper
wires and sensor input types. No field programming is re­quired. If controller does not function properly, the information
provided below can be used to program and troubleshoot the
drive.

11

START-UP

The Motormaster V electronic control will be powered up

For size 030-060 units, the Motormaster V control uses a 0

For size 070-100 units, two Motormaster V devices are

The pressure transducer(s) are connected to terminals 2, 5

BLU

Fig. 11 — Motormaster® V Accessory Wiring — 48/50P070-100 Units

LEGEND

CCB — Control Circuit Breaker
FR — Fan Relay
MMF — Motormaster V Fuses
MMPT — Motormaster Pressure Transducer
MMV — Motormaster V Control
OFC — Outdoor-Fan Contactor
OFM — Outdoor-Fan Motor
TB — Terminal Block

NOTE: Wire colors for MMPT:

2 — BLACK (A)
5 — GREEN (C)
6 — RED (B)

a48-8569

YEL

BLK

MMF-B

11 12

OFM-1 (070,075)
OFM-2 (090,100)

2321

22

13

CCB

BLK

RED

BLU

GRN/YEL, DRAIN

BLU

YEL

BLK

CIRCUIT B

BLK
RED
BLU

L3

L2

L1

MMV-B

T2

T3

T1

B-

B+

1

2

A

MMPT-B

RED

5

C

TB

6

2

13A

11

B

GRY

ADD FAN RELAY (FR-B)

IN PARALLEL WITH OFC-1

(070,075) OR OFC-2 (090,100)

14

12

BLK

5

9

FR-B

230-3-60 SHOWN.
REFER TO TABLE 4 FOR
ALTERNATE VOLTAGE
CONNECTIONS

13

14

FR-B

WHT

C1

C2

OFC

13C 15

13B

BLU

YEL

BLK

OFM-3 (070,075)
OFM-6 (090,100)

MMF-A

CIRCUIT A

BLK

RED

BLU

GRN/YEL, DRAIN

BLU

YEL

BLK

BLK
RED
BLU

L1

MMV-A

T2

T1

5

2

1

L3

L2

T3

B-

B+

B

A

C

MMPT-A

RED

IN PARALLEL WITH OFC-3

2

13A

11

GRY

ADD FAN RELAY (FR-A)

14

12

BLK

5

9

FR-A

230-3-60 SHOWN.
REFER TO TABLE 4 FOR
ALTERNATE VOLTAGE
CONNECTIONS

13

14

FR-A

WHT

C1

C2

OFC-3

13C 15

13B

TB

6

12

Drive Programming — Table 5 shows all program pa-

rameters for each of the operating modes. Refer to Trouble­shooting section before attempting to change programming in
the Motormaster V control.

CAUTION

It is strongly recommended that the user NOT change any
programming without consulting Carrier service personnel.
Unit damage may occur from improper programming.

TO ENTER PASSWORD AND CHANGE PROGRAM
VALUES:

1. Press MODE.

2. The display will read “00” and the upper right-hand deci­mal point will be blinking. This will activate the PASS­WORD prompt (if the password has not been disabled).

3. Use the UP and DOWN buttons to scroll to the password
value (the factory default password is “111”) and press
the MODE button. Once the correct password value is en­tered, the display will read “P01”, which indicates that the
PROGRAM mode has been accessed at the beginning of
the parameter menu (P01 is the first parameter).

NOTE: If the display flashes “Er”, 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 blinks. Use UP and DOWN
buttons 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 blinking,
indicating that the present parameter setting is being dis­played. Use the UP and DOWN buttons to change set­ting. Press MODE to store new setting.

6. Press MODE to store the new setting and also exit the
PROGRAM mode. To change another parameter, press
the MODE button again to re-enter the PROGRAM
mode (the parameter menu will be accessed at the param­eter that was last viewed or changed before exiting). If the
MODE button is pressed within two minutes of exiting
the PROGRAM mode, the password is not required to ac­cess the parameters.

7. After two minutes, the password must be entered in order
to access the parameters again.

TO CHANGE PASSWORD — Enter the current password
then change P44 to the desired password.

TO RESET FACTORY DEFAULTS — To recognize a fac­tory reset, the MMV controller must see a change in P48.

1. Cycle power from Motormaster

2. Enter PROGRAM mode by entering password.

3. Scroll to P48 by using UP and DOWN buttons and then
press MODE. One of the 12 mode numbers will appear.
(Modes 1, 2 and 4 are used for these units.)

4. Restore factory defaults by changing the value in P48 us­ing UP and DOWN buttons and then storing the value by
pressing MODE.

5. Press MODE again to re-display the value of P48.

6. Change the value of P48 to the desired factory default
mode (see Table 5) using UP and DOWN buttons then
press MODE. The Motormaster V control is now restored
to factory settings.

®

V control.

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, this is a normal condition. The fan
CANNOT go any faster to maintain set point.

If the VFD is not slowing down even though liquid line
pressure is below set point, the VFD could be set for manual
control or the control may be receiving faulty pressure trans­ducer output. Corrective action would include:

• Check that VDC signal between TB5 and TB2 is

between 0.5 v and 4.5 v.

• Restore VFD to automatic control.

• Change parameter P05 back to correct value shown in

Table 5.

The MMV control also provides real time monitoring of
key inputs and outputs. The collective group is displayed
through parameters P50 to P56 and all values are read only.
These values can be accessed without entering a password.

Press MODE twice and P50 will appear.

Press MODE again to display value.

To scroll to P51-P56 from P50, use UP and DOWN buttons
then press MODE to display the value.

• P50: FAULT HISTORY — Last 8 faults

• P51: SOFTWARE version

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

Usually rated input voltage x 1.4

• P53: MOTOR VOLTAGE — in percent of rated output

voltage

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

• 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
NOTE: The Motormaster V transducer is attached to circuit A.

If circuit A compressor power is interrupted (overload, high
pressure cutout, etc.) the outdoor fans will operate at a reduced
speed resulting from erroneous low pressure readings. This
process may cause a high pressure safety cutout on circuit B
compressor. If only circuit B is capable of operating for a tem­porary period of time because of a circuit A problem, the trans­ducer will have to be moved to the circuit B service port until
circuit A can be repaired. Once the problem is repaired, move
the transducer back to circuit A for proper unit operation.

Fault Lockout — 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 buttons to scroll through the last 8
faults. Any current faults or fault codes from the fault history
can be analyzed using Table 6.

TO DISABLE AUTOMATIC CONTROL MODE AND
ENTER MANUAL SPEED CONTROL:

1. Change P05 to ‘01- keypad’.

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

3. Set P05 to proper value to restore automatic control ac­cording to Table 5.

TO PROVIDE MANUAL START/STOP CONTROL — With
power removed from VFD, remove start command jumper and
install a switch between the appropriate start terminals as re­quired in Table 4.

13

Table 5 — Program Parameters for the Operating Mode

PARAMETERS DESCRIPTION MODE 1 MODE 2 MODE 4

P01 Line Voltage: 01 = low line, 02 = high line 01 02 02
P02 Carrier Freq: 01 = 4 kHz, 02 = 6 kHz, 03 = 8 kHz 01 01 01
P03 Startup mode: flying restart 06 06 06
P04 Stop mode: coast to stop 01 01 01

P05

P06 TB-14 output: 01 = none 01 01 01
P08 TB-30 output: 01 = none 01 01 01
P09 TB-31 Output: 01 = none 01 01 01
P10 TB-13A function sel: 01 = none 01 01 01
P11 TB-13B function sel: 01 = none 01 01 01
P12 TB-13C function sel: 01 = none 01 01 01
P13 TB-15 output: 01 = none 01 01 01
P14 Control: 01 = Terminal strip 01 01 01
P15 Serial link: 02 = enabled 9600,8,N,2 with timer 02 02 02
P16 Units editing: 02 = whole units 02 02 02
P17 Rotation: 01 = forward only, 03 = reverse only 01 01 01
P19 Acceleration time: 20 sec 20 20 20
P20 Deceleration time: 10 sec 10 10 10
P21 DC brake time: 0 000
P22 DC BRAKE VOLTAGE 0% 0 0 0
P23 Min freq = 8 Hz ~ 100 – 160 rpm 8 8 8
P24 Max freq 60 60 50
P25 Current limit: (%) 125 110 110
P26 Motor overload: 100 100 100 100
P27 Base freq: 60 or 50 Hz 60 60 50
P28 Fixed boost: 0.5% at low frequencies 0.5 0.5 0.5
P29 Accel boost: 0% 000
P30 Slip compensation: 0% 0 0 0
P31 Preset spd #1: speed if loss of control signal 57 57 47
P32 Preset spd #2: 0 000
P33 Preset spd #3: 0 000
P34 Preset spd 4 default — R22 setpoint. TB12-2 open 24.0 24.0 24.0
P35 Preset spd 5 default — R134a setpoint. TB12-2 closed 12.6 12.6 12.6
P36 Preset spd 6 default 0 0 0
P37 Preset spd 7 default 0 0 0
P38 Skip bandwidth 000
P39 Speed scaling 000
P40 Frequency scaling 50 or 60 Hz 60 60 50
P41 Load scaling: default (not used so NA) 200 200 200
P42 Accel/decel #2: default (not used so NA) 60 60 60
P43 Serial address 111
P44 Password:111 111 111 111

P45

P46

P47 Clear history? 01 = maintain. (set to 02 to clear) 01 01 01
P48 Program selection: Program 1 – 12 01 02 04
P61 PI Mode: 05 = reverse, 0-5V, 01 = no PID 05 05 05
P62 Min feedback = 0 (0V *10) 0 0 0
P63 Max feedback = 50 (5V * 10) 50 50 50
P64 Proportional gain = 3.5% 3.5 3.5 3.5
P65 Integral gain = .2 .2 .2 .2
P66 PI accel/decel (setpoint change filter) = 10 10 10 10
P67 Min alarm 000
P68 Max alarm 000

LEGEND

NA — Not Applicable
PI — Proportional Integral
PID — Proportional Integral Derivative

Standard Speed source: 01 = keypad, 04 = 4-20mA (NO PI), 05 = R22 or R410A,
06 = R134a

Speed at min signal: 8 Hz; used when PID mode is disabled and 4-20 mA input is
at 4 mA

Speed at max feedback: 60 or 50 Hz. Used when PID disabled and 4-20 mA input is
at 20 mA

05 05 05

888

60 60 50

14

EPM Chip — The drive uses a electronic programming

module (EPM) chip to store the program parameters. This is an
EEPROM memory chip and is accessible from the front of the
VFD. It should not be removed with power applied to the
VFD.

Loss of CCN Communications — Carrier Comfort

Network
systems can be affected by high frequency electrical noise

®

(CCN) communications with external control

Table 6 — Fault Codes

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.

generated by the Motormaster

®

V control. Ensure unit is well
grounded to eliminate ground currents along communication
lines.

If communications are lost only while Motormaster V con­trol is in operation, order a signal isolator (CEAS420876-2)
and power supplies (CEAS221045-01, 2 required) for the CCN
communication line.

CODE DESCRIPTION

AF High Temperature Fault Automatic Ambient temperature is too high;

CF Control Fault Manual A blank EPM, or an EPM with cor-

cF Incompatibility Fault Manual An EPM with an incompatible param-

F1 EPM Fault Manual The EPM is missing or damaged. Install EPM or replace with new EPM.

F2—F9

Fo
GF Data Fault Manual User data and Carrier defaults in the

HF High DC Bus Voltage Fault Automatic Line voltage is too high; Deceleration

JF Serial Fault Automatic The watchdog timer has timed out,

LF Low DC Bus Voltage Fault Automatic Line voltage is too low. Check line voltage — set P01

OF Output Transistor Fault Automatic Phase to phase or phase to ground

PF Current Overload Fault Automatic VFD is undersized for the application;

SF Single-phase Fault Automatic Single-phase input power has been

Drive displays

‘---’ even

though drive

should be

running

VFD flashes

“---”

and LCS

VFD flashes

57 (or 47)

and LCS

LEGEND

EPM — Electronic Programming Module
FR — Fan Relay
LCS — Loss of Control Signal
TB — Terminal Block
VFD — Variable Frequency Drive

Internal Faults Manual The control board has sensed a

Start Contact is Not Closed Automatic Start contact is missing or not

Start Contact is Not Closed Automatic Start contact not closed. Check FR for closed contact.

Speed Signal Lost Automatic Speed signal lost. Drive will operate

RESET

METHOD

PROBABLE CAUSE CORRECTIVE ACTION

Cooling fan has failed (if equipped).

rupted data has been installed.

eter version has been installed.

problem

EPM are corrupted.

rate is too fast; Overhauling load.

indicating that the serial link has been
lost.

short circuit on the output; Failed out­put transistor; Boost settings are too
high; Acceleration rate is too fast.

Mechanical problem with the driven
equipment.

applied to a three-phase drive.

functioning.

at 57 (or 47) Hz until reset or loss of
start command. Resetting requires
cycling start command (or power).

Check cooling fan operation.

Perform a factory reset using Parameter
48 – PROGRAM SELECTION. See Drive
Programming section.

Either remove the EPM or perform a fac­tory reset (Parameter 48) to change the
parameter version of the EPM to match
the parameter version of the drive.

Consult factory.

Restore factory defaults by toggling P48 to
another mode. Then set P48 to desired
mode to restore all defaults for that mode.
See Drive Programming section. If that
does not work, replace EPM.

Check line voltage — set P01
appropriately.

Check serial connection (computer).
Check settings for P15.
Check settings in communication software
to match P15.

appropriately.
Reduce boost or increase acceleration

values. If unsuccessful, replace drive.

Check line voltage – set P01 appropri­ately.
Check for dirty coils.
Check for motor bearing failure.

Check input power phasing.

Check fan relay.

Transducer signal lost. Check VDC signal
between TB5 and TB2. Should be in range
of 0.5V to 4.5V. 5VDC output should be
present between TB6 and TB2.

15

Copyright 2009 Carrier Corporation

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Catalog No. 04-53480070-01 Printed in U.S.A. Form 48/50P-2SI Pg 16 9-09 Replaces: New