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Wiring diagram, Troubleshooting, Step 1 — status codes – Carrier 58MEC User Manual

Page 13: Two--stage control, Winterizing the furnace 58me c, Fig. 17, See fig. 22 for wiring diagram, Fig. 18

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13

TEST / TWIN

HUM

PL
T

SEC-2

SEC-1

COM

24VAC

PL1

W2 Y

DHUM G COM W/W1 Y/Y2 R

24V

FUSE 3-AMP

EAC-2

EAC-1

L1

BL-1

PR-1

L2

COM

HI HT

COOL

LO HT

SPARE 2 SPARE 1

24V MTR

T

APS

BLOWER SPEED
TERMINALS

115-VAC (L2)
NEUTRAL
CONNECTIONS

LED OPERATION
& DIAGNOSTIC LIGHT

3-AMP FUSE

24-V THERMOSTAT
TERMINALS

SET UP SWITCHES
LOW HEAT ONLY
AND BLOWER
OFF-DELAY

TWINNING AND/OR
COMPONENT TEST
TERMINAL

ACRDJ - AIR CONDITIONING
RELAY DISABLE JUMPER

HUMIDIFIER TERMINAL
(24 VAC 0.5 AMPS MAX)

TRANSFORMER
24 VAC CONNECTIONS

PL1-LOW VOLTAGE
MAIN HARNESS CONNECTOR

PL2 - HOT SURFACE
IGNITER/INDUCE R
MOTOR CONNECTION

115 VAC
BLOWER POWER (BL1)
CONNECTION

115 VAC LINE (L1)
CONNECTION

LHT
OFF
DLY

ON

OFF

1 2 3

IDR

HSIR

IDM

IHI/L

OR

PL2

1

HSI HI LO

1

A08344

Fig. 17 --

Two--Stage Control

5. Insert funnel in tube and pour up to 1 quart of antifreeze,

propylene glycol (RV, swimming pool antifreeze, or equi-
valent) into funnel until it is visible at point where condens-
ate enters open drain. (See Fig. 20.)

6. Reconnect drain cap to inducer housing.
7. Replace main furnace door.
8. Propylene glycol need not be removed before restarting fur-

nace.

WIRING DIAGRAM

See Fig. 22 for Wiring Diagram.

TROUBLESHOOTING

Use the Troubleshooting Guide, the status code LED on the
control and the Component Test to isolate furnace operation
problems.

Step 1 — Status Codes

For an explanation of status codes, refer to service label located on
back of main furnace door or Fig. 21. The stored status codes will
NOT be erased from the control memory, if 115-or 24-v power is
interrupted. The control will store up to 7 Status Codes.
NOTE: Removing the blower access door will open the blower
access door switch and terminate 115--v power to the control. To
read current status code, remove main furnace door. The status
code LED can be viewed through the sight glass on the blower
access door.
NOTE: NO thermostat signals may be present at control and all
blower off delays must be completed to view previous codes.

To retrieve previous codes, remove one of the red main limit or
flame rollout switch wires 1 to 4 sec until the LED light goes out,

the reconnect it. (Do not leave red wire disconnected for longer
periods of time as the control will assume an overtemperature

condition exists and will respond with blower operation.) This

places the control in the status recall mode and displays the first
code stored in memory.

A07911

Fig. 18 --

Winterizing the Furnace

58ME

C