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American Water Heater (A)BCG38T500-8P ユーザーズマニュアル

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Servicing should only be performed by a Qualifi ed Service Agent
TROUBLESHOOTING
TEST 1: 120 VAC TO HEATER CHECK
Conditions:
•  No Green Display “Power” LED on.
•  Plugs are in receptacles.
•  Supply power breaker is not open.
•  On/Off heater switch is on.
E2
Display 
LEDs
Ignition Control 
Board
Ground
120 V.
(E14)
From Heater 
Control
(E13) To ON/OFF 
Switch
Supply Neutral
E9 Not Used
White Rodgers 
Integrated Control
BY INSTALLER
FACTORY INSTALLED
120 VAC CIRCUIT
1a 1 1b
GROUND
TO EARTH
EARTH GROUND
NEUTRAL
HOT 120 VAC
BK
W
W
R
R
R
R
BL
BR
SENSOR
IGNITOR/FLAME
E2
Display 
LEDs
Ignition Control 
Board
Groun
120 V.
(E14)
From Heater 
Control
(E13) To ON/OFF 
Switch
Supply Neutral
E9 Not Used
White Rodgers 
Integrated Control
I t
t d C
t l
BY INSTALLER
T
T
FA
F
F CTORY INSTALLED
T
T
120 VA
V
V C CIRCUIT
1a 1 1b
GROUND
TO EARTH
EARTH GROUND
NEUTRAL
HOT 120 VA
V
V C
BK
W
W
R
R
R
R
BL
BR
SENSOR
IGNITOR/FLAME
Figure 19
TEST 1
120 V. AC check to water heater ON/OFF switch
Check for 115-125 VAC black wire to ground\
115 VAC check to E13 Terminal and 2B receptacle.
IF.........
then............
voltage is not present from on/off switch center 
black wire to ground
•  check conditions above.  
•  check wiring from switch to break box.
Power is present from center on/off terminal
check power from on/off switch to ignition board terminal E13
Voltage is not present at E13 to ground
•  check wiring from on/off. Left-outside terminal to E13.  
•  Replace on/off switch.
Power is present at E13
check power from E14 to water heater control E2 receptacle
Voltage is not present from water heater control 
receptacle E2 black to ground
•  check wiring from ignition control board E14 to water heater control    
 receptacle 
E2.
•  Replace ignition control board.
Power is present at E2.
green LED should be on.