Carrier 48XL installation instructions Rated Heating, High Stage Low Stage

Table

3 -

Air

Delivery

and Temperature

Rise

at Rated

Heating

Input

Rated

Heating

Input

(Btu/hr)

Heating

Rise

Range

OF (°C)

Heating

Rise

Either

Stage,

°F

(°C)

Unit

High Stage

Low Stage

High Stage

Low Stage

"Efficiency ....

Comfort"

High

Stage

Low Stage

High Stage

Low Stage

48XL(-,N)024040

40,000

26,000

20 -

50

15-45

35

30

40

35

48XL(-,N)030040

(11-28)

(8-25)

(19)

(17)

(22)

(19)

48XL(-,N)030060

25 -

55

25 -

55

40

50

48XL(-,N)036060

60,000

39,000

48XL(-,N)042060

(14-31)

(14-31)

(22)

(28)

48XL(-,N)036090

48XL(-,N)042090

35 -

65

35 -

65

50

55

48XL(-,N)048090

90,000

58,500

(19-36)

(19-36)

(28)

(31)

48XL(-,N)060090

48XL(-,N)048115

115,000

75,000

30 -

60

30 -

60

45

50

48XL(-,N)060115

(17-33)

(17-33)

(25)

(28)

48XL(-,N)048130

130,000

84,500

35 -

65

35 -

65

50

55

48XL(-,N)060130

(19-36)

(19-36)

(28)

(31)

Airflow delivery values for external static pressure values of up to 1 IN. W.C.

Table

4 -

Heat

Pump/Air

Conditioner

Board

Status

Codes

AMBER

LED

OPERATION

FAULT

FLASH

POSSIBLE

CAUSE

AND ACTION

CODE

On solid, no

Standby -

no call for

unit operation

None

flash

Normal

operation.

Standard

Ther-

Rapid,

con-

Unit

being

controlled

by standard

thermostat

inputs

instead

of

Infin-

Emergency

Mode

mostat

Control

tinuous

ity Control.

Only

high

stage

operation

is available.

This

operating

flashing

mode

should

be

used

in emergency

situations

only.

Low Stage

Cool/Heat

Operation

None

1, pause

Normal

operation.

High Stage

Cool/Heat

Operation

None

2, pause

Normal

operation.

System

Commu-

16

Communication with UI lost. Check wiring to UI, indoor and outdoor units.

nications

Failure

Invalid

Model

Plug

25

Control

does not

detect

a model plug

or detects

an

invalid model

plug. Unit

will not operate without correct model plug.

High-Pressure

31

High-pressure

switch

trip. Check

refrigerant

charge,

outdoor

fan

operation

Switch

Open

and coils for airflow restrictions.

Low-Pressure

32

Low-pressure

switch trip. Check refrigerant charge

and

indoor

air

flow.

Switch

Open

Control

Fault

45

Outdoor

unit

control

board has

failed.

Control

board needs

to be

replaced.

Brown

Out

(230

46

Line voltage

< 187v for at least

4 seconds.

Compressor

and fan operation

v)

not allowed

until

voltage>190v.

Verify

line voltage.

There is no 230v at the contactor when indoor unit is powered and cooling/

No 230v

at Unit

47

heating

demand

exists.

Verify

the

disconnect

is closed

and

230v wiring

is

connected

to the

unit.

Outdoor

Air Temp

53

Outdoor

air

sensor

not

reading

or

out

of range.

Ohm

out

sensor

and

check

Sensor

Fault

wiring.

Outdoor

Coil

Sen-

55

Coil sensor

not

reading

or out

of range.

Ohm out

sensor

and

check

wiring.

sor

Fault

Thermistors

Out of

56

Improper

relationship

between

coil

sensor

and

outdoor

air sensor.

Ohm out

Range

sensors

and

check

wiring.

Low Stage

Ther-

Compressor

voltage

sensed, then

disappears

while

cooling

or

heating

de-

mal

Cutout

71

mand

exists.

Possible causes are internal compressor

overload

trip

or

start

relay not releasing (if installed).

High

Stage

Ther-

Compressor

voltage

sensed, then

disappears

while

cooling

or

heating

de-

mal

Cutout

72

mand

exists.

Possible causes are internal compressor

overload

trip

or

start

relay not releasing (if installed).

Contactor

Shorted

73

Compressor

voltage

sensed when

no demand

for compressor

operation

exists. Contactor

may be stuck

closed

or there is a wiring error.

No 230V

at Com-

74

Compressor

voltage

not

sensed

when

compressor

should

be starting.

Con-

pressor

tactor

may

be stuck

open or there

is a wiring

error.

Low Stage

Ther-

81

Thermal

cutout

occurs

in three

consecutive

low/high

stage

cycles.

Low

mal

Lockout

stage

locked

out

for 4 hours or

until 24v

power

recycled.

High

Stage

Ther-

82

Thermal

cutout

occurs

in three

consecutive

high/low

stage

cycles.

High

mal

Lockout

stage

locked

out

for 4 hours or

until 24v

power

recycled.

Low-Pressure

83

Low-pressure

switch

trip has

occurred

during

3 consecutive

cycles.

Unit

Lockout

operation

locked

out

for 4 hours

or until

24v

power

recycled.

High-Pressure

84

High-pressure

switch

trip has

occurred

during

3 consecutive

cycles.

Unit

Lockout

operation

locked

out

for 4 hours

or until

24v

power

recycled.

21