Amana GUIA Series Service Instructions Manual page 133

SERVICING
Power
Conditioning
HVAC System Control
INPUTS
24 Volts A/C
Compressor
On/Hi/Low
Fan On
Reversing Valve
Aux./Emergency Heat
Capacity Select
Outputs
CFM Demand
NOTE: An inductor (Power Correction Factor Choke) is re-
quired when powering the 3/4 and 1 horsepower motors
with 115 volts. The operation of this inductor is to reduce
the line current by storing the electrical energy in a mag-
netic field, such that the voltage AC waveform leads the
current AC waveform. In other words, the inductor reduces
line current which extends the life of the 3/4 and 1 horse-
power motors. The furnaces requiring an inductor are shown
in the following chart.
80% Models
GUIV090**50
GUIV115**50
IMPORTANT: If the inductor fails, there will be no motor
operation since this is the "LINE" power supply, black wire
(BK-6), from the integrated ignition control to the motor. To
determine if the inductor is at fault, you can bypass by the
inductor by disconnecting the black wire (BK-6) wire from
the inductor and connecting it directly to the motor. If the
motor operates then the inductor will need to be replaced.
Checking ECM/ICM Motors
ECM/ICM motors connect directly to the AC Line Voltage.
DO NOT insert contactors in series with the ECM/ICM Mo-
tor AC Line. The control is powered continuously to insure
reliable start-up. The connector plug is polarized, verify and
reverify correct connector orientation before applying power.
DO NOT force plug into motor and make sure power is off
before inserting power connector. DO NOT apply voltage to
terminals 1 or 2.
AC to DC
Conversion
Motor
Control
ECM/ICM CONTROL FLOW CHART
90% Models
GUVA070**40
GUVA090**50
GUVA115**50
Inverter
WARNING
LINE VOLTAGE NOW PRESENT
Check for line voltage on terminals 4 and 5. Verify terminal 3
is ground. terminals. Terminals 1 and 2 are jumpered in the
harness for 120VAC operation.
AC Line Hot Connection
5
AC Line Neutral Connection
4
Gnd
3
2
Lines 1 and 2 will be connected
for 120VAC Power Connector
1
applications only
POWER CONNECTOR
(1/2 HP MOTORS)
"Motor Half"
(Viewed from Plug End)
inductor
5
AC Line Neutral Connection
4
Gnd
3
2
Lines 1 and 2 will be connected
for 120VAC Power Connector
1
applications only
POWER CONNECTOR
(3/4 & 1 HP MOTORS)
"Motor Half"
(Viewed from Plug End)
ECM
Blower
Motor
AC Line Hot Connection
133
Rev. 1