
144
ERC Control Board, Keypad & Display
ERC CONTROL BOARD
AND KEYPAD /
DISPLAY
KEYPAD /
DISPLAY NOT
WORKING
ERC POWER
LED NOT ON
KEYPAD
BUTTON(S) DO
NOT RESPOND,
RESPECTIVE
LEDS DO NOT
COME ON
VERIFY PROPER
VOLTAGE ON
ERC TERMINALS
L1 AND L2
YES
NO
YES
NO
POWER ERC
OFF, THEN ON,
VERIFY NO
COUNTDOWN
“PdXX”ON
DISPLAY
TURN POWER
OFF THEN ON
TO RESET ERC
KEYPAD
BUTTONS NOW
WORK
REPLACE
ERC
CONTROL
BOARD
DISPLAY SHOWS
POWER UP
COUNTDOWN“PdXX”
REPLACE KEYPAD / DISPLAY
020001986
REPLACE ERC CONTROL
BOARD 020001985
IF DISPLAY FLASHES ERRATIC
NUMBERS / SYMBOLS, REPLACE
KEYPAD / DISPLAY020001986
GENERAL NOTE: FOR DISPLAY PROBLEMS, IF
COUNTDOWN OCCURS ON POWER UP, “PdXX”,
THEN DISPLAY IS PROBABLY AT FAULT, NOT
ERC
STH13_Tech.book Page 144 Wednesday, September 15, 2010 3:20 PM