Goodman ACVC96 BA Series, Обслуживание и устранение неисправностей

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SERVICING
45
WARNING
HIGH VOLTAG E
D
IS C ONN EC T
ALL
POW ER B E FO RE S ER VI C ING O R
C HANGING ANY E L EC T R I C AL WI R ING .
M
ULTIPL E POW ER
SOU RCE S MAY B E P RE S E NT .
F
AILU RE TO DO SO MAY C AUS E
P R OP ER TY DAMAG E , P ER SONAL IN J U R Y O R D E ATH .
To use the diagnostic tool, perform the following steps:
1. Disconnect power to the furnace.
2. Disconnect the 4-circuit control harness from the motor.
3. Plug the 4-circuit connector from the diagnostic tool into
the motor control connector.
4. Connect one alligator clip from the diagnostic tool to a
ground source.
5. Connect the other alligator clip to a 24VAC source.
NOTE: The alligator clips are NOT polarized.
NOTE: The UltraCheck-EZ
TM
diagnostic tool is equipped with
a non-replaceable fuse. Connecting the tool to a source
other than 24VAC could damage the tool and cause the fuse
to open. Doing so will render the diagnostic tool inoperable.
6. Turn on power to the furnace.
L
IN E VOLTAG E NOW P RE S E NT
WARNING
7. Depress the orange power button on the diagnostic tool
to send a run signal to the motor. Allow up to 5 seconds
for the motor to start.
NOTE: If the orange power button does not illuminate when
depressed, the tool either has an open fuse or is not properly
connected to a 24VAC source.
8. The green LED on the diagnostic tool will blink indicating
communications between the tool and motor. See table
below for indications of tool indicators and motor actions.
Replace or repair as needed.
Power
Button
Green
LED
Motor
Action
Indication(s)
OFF OFF
Not
Rotating
Confirm 24VAC to
UltraCheck-EZ
TM
tool.
If 24VAC is confirmed,
diagnostic tool is
inoperable.
ON Blinking Rotating
Motor and control/end
bell are functioning
properly.
ON OFF Rotating Replace motor
control/end bell.
ON Blinking
Not
Rotating
Check motor (see
Motor Check s below).
ON OFF
Not
Rotating
Replace motor
control/end bell; verify
motor (see Motor
Check s below).
9. Depress the orange power button to turn off motor.
10. Disconnect power. Disconnect diagnostic tool.
11. Reconnect the 4-wire harness from control board to motor.
Electrical Checks - High Voltage Power Circuits
WARNING
HIGH VOLTAG E
D
IS C ONN EC T
ALL
POW ER B E FO RE S ER VI C ING O R
C HANGING ANY E L EC T R I C AL WI R ING .
M
ULTIPL E POW ER
SOU RCE S MAY B E P RE S E NT .
F
AILU RE TO DO SO MAY C AUS E
P R OP ER TY DAMAG E , P ER SONAL IN J U R Y O R D E ATH .
1. Disconnect power to the furnace.
2. Disconnect the 5-circuit power connector to the ECM motor.
3. Turn on power to the furnace.
L
IN E VOLTAG E NOW P RE S E NT
WARNING
4. Measure voltage between pins 4 and 5 on the 5-circuit
connector. Measured voltage should be the same as the
supply voltage to the furnace.
5
4
3
2
1
Lines 1 and 2 will be connected
for 120VAC Power Connector
applications only
Gnd
AC Line Neutral Connection
AC Line Hot Connection
}
POWER CONNECTOR
(1/2 HP MOTORS)
“Motor Half“
(Viewed from Plug End)
5
4
3
2
1
Lines 1 and 2 will be connected
for 120VAC Power Connector
applications only
Gnd
AC Line Neutral Connection
AC Line Hot Connection
}
inductor
POWER CONNECTOR
(3/4 & 1 HP MOTORS)
“Motor Half“
(Viewed from Plug End)
5. Measure voltage between pins 4 and 3. Voltage should
be approximately zero.
6. Measure voltage between pins 5 and 3. Voltage should
be the same as the supply voltage to the furnace.