Carrier 48XL - Manual (Page 21)

Table 3 - Air Delivery and Temperature Rise at Rated Heating Input
Rated Heating input (Btu/hr) Heating Rise Range ®F (®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
48XL(-,N)030040
40,000 26,000
20 - 50
(11-28) 15-45
(8-25)
35
(19)
30
(17)
40
(22)
35
(19)
48XL(-,N)030060
48XL(-,N)036060
48XL(-,N)042060
60,000 39,000
25 - 55
(14-31) 25 - 55
(14-31) 40
(22)
50
(28)
48XL(-,N)036090
48XL(-,N)042090
48XL(-,N)048090
48XL(-,N)060090
90,000 58,500
35 - 65
(19-36) 35 - 65
(19-36) 50
(28)
55
(31)
48XL(-,N)048115
48XL(-,N)060115
115,000 75,000
30 - 60
(17-33) 30 - 60
(17-33) 45
(25)
50
(28)
48XL(-,N)048130
48XL(-,N)060130
130,000 84,500
35 - 65
(19-36) 35 - 65
(19-36) 50
(28)
55
(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
OPERATION FAULT
AMBER LED
FLASH
CODE
POSSIBLE CAUSE AND ACTION
Standby - no call for unit operation None
On solid, no
flash
Normal operation.
Emergency Mode
standard Ther­
mostat Control
Rapid, con­
tinuous
flashing
Unit being oontroiled by standard thermostat inputs instead of Infin­
ity Controi. Oniy high stage operation is avaiiabie. This operating
mode should be used in emergency situations oniy.
Low Stage Cool/Heat Operation None 1, pause Normal operation.
High Stage Cool/Heat Operation None 2, pause Normal operation.
System Commu­
nications Failure 16
Communication with Ul lost. Check wiring to Ul, indoor and outdoor units.
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
Switch Open
31
High-pressure switch trip. Check refrigerant charge, outdoor fan operation
and coils for airflow restrictions.
Low-Pressure
Switch Open
32 Low-pressure switch trip. Check refrigerant charge and indoor air flow.
Control Fault 45 Cutdoor unit control board has failed. Control board needs to be replaced.
Brown Out (230
V)
46
Line voltage < 187v for at least 4 seconds. Compressor and fan operation
not allowed until voltage^l 90v. Verify line voltage.
No 230v at Unit 47
There is no 230v at the contactor when indoor unit is powered and cooling/
heating demand exists. Verify the disconnect is closed and 230v wiring is
connected to the unit.
Outdoor Air Temp
Sensor Fault
53
Cutdoor air sensor not reading or out of range. Chm out sensor and check
wiring.
Outdoor Coil Sen­
sor Fault
55 Coil sensor not reading or out of range. Chm out sensor and check wiring.
Thermistors Out of
Range
56
Improper relationship between coil sensor and outdoor air sensor. Chm out
sensors and check wiring.
Low Stage Ther­
mal Cutout
71
Compressor voltage sensed, then disappears while cooling or heating de­
mand exists. Possible causes are internal compressor overload trip or start
relay not releasing (if installed).
High Stage Ther­
mal Cutout
72
Compressor voltage sensed, then disappears while cooling or heating de­
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
pressor
74
Compressor voltage not sensed when compressor should be starting. Con­
tactor may be stuck open or there is a wiring error.
Low Stage Ther­
mal Lockout
81
Thermal cutout occurs in three consecutive low/ high stage cycles. Low
stage locked out for 4 hours or until 24v power recycled.
High Stage Ther­
mal Lockout
82
Thermal cutout occurs in three consecutive high/low stage cycles. High
stage locked out for 4 hours or until 24v power recycled.
Low-Pressure
Lockout
83
Low-pressure switch trip has occurred during 3 consecutive cycles. Unit
operation locked out for 4 hours or until 24v power recycled.
High-Pressure
Lockout
84
High-pressure switch trip has occurred during 3 consecutive cycles. Unit
operation locked out for 4 hours or until 24v power recycled.
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