Bryant SINGLE PACKAGE ROOFTOP ELECTRIC COOLING/GAS HEATING UNITS 581A - Manual (Page 30)

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C. Condenser-Fan Motor Protection
Each condenser-fan motor is internally protected against
overtemperature.
D. High- and Low-Pressure Switches
If either switch trips, or if the compressor overtemperature
switch activates, that refrigerant circuit will be automati-
cally locked out by the CLO. To reset, manually move the
thermostat setting.
E. Freeze Protection Thermostat (FPT)
An FPT is located on the top and bottom of the evaporator
coil. They detect frost build-up and turn off the compressor,
allowing the coil to clear. Once the frost has melted, the com-
pressor can be reenergized by resetting the compressor
lockout.
XIV. RELIEF DEVICES
All units have relief devices to protect against damage from
excessive pressures (i.e., fire). These devices protect the high
and low side.
XV. CONTROL CIRCUIT, 24-V
This control circuit is protected against overcurrent by a
3.2 amp circuit breaker. Breaker can be reset. If it trips,
determine cause of trouble before resetting
XVI. REPLACEMENT PARTS
A complete list of replacement parts may be obtained from
any Carrier distributor upon request.
XVII. DIAGNOSTIC LEDS
The IGC control board has a LED for diagnostic purposes.
The IGC error codes are shown in Table 15.