24
25
CONTROL
FUNCTION
NOTE:
ALL
EXTERNAL
MAINTENANCE
T
O BE PERFORMED BY
A
CER
TIFIED ELECTRICIAN ONL
Y
PROBLEM
PROBABLE CAUSE
SOLUTION
NO POWER INDICA
TION
A
T
ON/OFF SWITCH
LACK OF POWER
A
T
SUPPL
Y
CHECK FOR POWER
DOOR SAFETY
SWITCH NOT
ENGAGED
ENSURE
THA
T
DOOR SWITCH IS OPERA
TING
DEFECTIVE DOOR SWITCH
REMOVE MAIN
ACCESS DOOR
AND CONTROL
COVER
PLA
TE.
APPL
Y
POWER
T
O HR
V
AND CLOSE DOOR SWITCH
AND
TEST
THE
TWO LEADS ON BACK OF SWITCH, ONE SHOULD
HA
VE
A
READING. CLOSE DOOR SWITCH
AND CHECK
OTHER LEAD
WITH METER
AND KNOWN NEUTRAL. IF NO
READING IS PRESENT
THEN REPLACE SWITCH.
DEFECTIVE POWER SWITCH
POWER UP
HR
V
, CLOSE DOOR SAFETY
SWITCH,
TURN
POWER SWITCH
T
O ON. PLACE ONE LEAD OF
VOL
T
METER
ON KNOWN NEUTRAL
AND
THE OTHER ON
TERMINALS
ON BACK OF SWITCH, ONE
A
T
A
TIME.
VOL
TAGE READING
SHOULD BE LINE
VOL
TAGE ON BOTH BLACK LEADS. IF
NOT
, THEN REPLACE SWITCH. CONFIRM NEUTRAL
A
T
SWITCH LEAD
WITH KNOW
NEUTRAL
DISCONNECT
POWER
T
O HR
V
. IDENTIFY
KNOWN NEUTRAL, POSITION ONE LEAD
OF OHM METER ON KNOWN NEUTRAL
AND OTHER
A
T
NEUTRAL
LEAD
A
T
REAR OF SWITCH. IF NO READING
THEN
INVESTIGA
TE CONNECTION OF NEUTRAL
LEAD
WIRE.
AND
OUTPUT
. IF NO READING
THEN REPLACE FIL
TER.
NOTHING
WORKS
PO
W
E
R
O
FF
–
U
N
PL
U
G
G
E
D
F
R
O
M
P
O
W
E
R
S
O
U
R
C
E
REST
AR
T
HR
V
. THIS
WILL
RESET
THE ELECTRONIC
CONTROL
BOARD
