Carrier 58MCA - Page 11

b. Remove main furnace door.
c. Look into blower access panel sight glass for current LED
status.
d. Remove blower access panel.
e. Turn setup switch SW-1 to ON position. (See Fig 15 or 22
for location.)
f. Jumper thermostat terminals R, W, and Y on control center.
g. Manually close blower access panel door switch.
Blower access panel door switch opens 24-v power to control
center. No component operation can occur. The 115-v power
is still present at control center, transformer, inducer motor,
and main blower motor. Caution must be taken when manu-
ally closing this switch for service purposes. Failure to follow
this warning could result in personal injury or death.
h. After fault code 11 flashes for at least 2 times, remove R,
W, and Y jumpers.
i. Turn setup switch SW-1 to OFF position.
j. Release blower access panel door switch and replace
blower access panel.
k. Operate furnace through 1 heat cycle to check for proper
operation and check LED status.
l. If furnace is operating properly and LEDs indicate proper
operation, replace main furnace door.
3. The control can also assist in troubleshooting by performing a
Component Test. The Component Test will functionally
operate all furnace components, except the gas valve. Proceed
with the following to initiate Component Test:
a. Leave 115-v power to furnace turned on.
b. Remove main furnace door.
c. Remove blower access panel.
d. Turn setup switch SW-6 to ON position.
e. Manually close blower access panel door switch.
Blower access panel door switch opens 24-v power to control
center. No component operation can occur. The 115-v power
is still present at control center, transformer, inducer motor
and main blower motor. Caution must be taken when manu-
ally closing this switch for service purposes. Failure to follow
this warning could result in personal injury or death.
f. When above items have been completed, the following will
occur:
(1.) Green LED lights for 1 sec, followed by both the green
and yellow LEDs which light for another 1 sec. During
this period, the control is checking itself out.
Fig. 14—Fixed Control Center
A93052
G
R
Y
W
3-AMP FUSE
Com
24V
HUMIDIFIER TERMINAL
(24-VAC 0.5 AMP MAX)
LED OPERATION &
DIAGNOSTIC LIGHT
HARNESS CONNECTOR
24V TRANSFORMER SEC-2
SPARE 1
SPARE 2
EAC 1 (BLACK)
EAC-ELECTRONIC AIR CLEANER
TERMINALS (115-VAC 1 AMP MAX)
EAC 2 (WHITE)
115-VAC (L2) NEUTRAL
CONNECTION
24V THERMOSTAT
TERMINALS
BLOWER SPEED
SELECTION TERMINALS
INDUCER MOTOR
CONNECTOR
115-VAC (L1)
POWER
SUPPLY
HOT SURFACE
IGNITOR
CONNECTOR
HEAT
COOL
BLOWER OFF DELAY
ADJUSTMENT SWITCH
SEC-1
TEST/TWIN
HUM
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