Carrier T--298 - Manual (Page 23)

T--298 2-3
SYSTEM AND PROBABLE CAUSE PROBABLE REMEDY
2.14 INADEQUATE HEAT (FREE--BLOW HEAT ONLY)
1. No heat from heat strip. 1. Verify AMP draw . ( 13.8 AMP)
Verify resistance through heating element. (9 OHM)
Check bi--metal switch. If open, replace switch.
2.15 INADEQUATE HEAT (HEAT--PUMP)
NOTE: Allow unit to operate 15 minutes after switch-
ing from cooling mode.
1. Reversing valve not operating
2. Outdoor coil icing.
1. Check for 115 volts at reversing valve coil
Check for reversing valve restriction
Verify compressor operation
2. Check outdoor coil sensor
Clearing Diagnostic Alarms
When a repair has been accomplished due to a corresponding alarm, the alarm must be cleared. This is done by
disconnecting the 12 VDC power to the ducted ceiling assembly for one or two seconds. Once the 12 VDC power is
reconnected, the alarm should have been cleared.