Unit
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)
"Efficiency .... Comfort"
High Stage Low Stage High Stage Low Stage
High Stage Low Stage High Stage
20 - 50 15-45 35 30 40
40,000 26,000
(11-28) (8-25) (19) (17) (22)
Low Stage
48XL(-,N)024040 35
48XL(-,N)030040 (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
Control does not detect a model plug or detects an invalid model plug. Unit
Invalid Model Plug 25
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.
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