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26
27
NOTE:
ALL
EXTERNAL
MAINTENANCE
T
O BE PERFORMED BY
A
CER
TIFIED ELECTRICIAN ONL
Y
PROBLEM
PROBABLE CAUSE
SOLUTION
EXTERNAL
LOW
VOL
TAGE
WIRE IS SHOR
TED
OUT
BY
A
ST
APLE OR NAIL
DISCONNECT
LEADS
A
T
BOTH ENDS @
TEST
FOR
CONTINUITY
BETWEEN LEADS.
DAMPER MOT
OR ST
A
YS IN
DEFROST
. DEFROST
L.E.D NOT
ILLUMINA
TED.
LEAD.
DEFECTIVE DAMPER MOT
OR
DEFECTIVE CONTROL
BOARD
PICK COMMON COLOURED (2) DAMPER MOT
OR LEADS.
PROBE 1 OF
THESE LEADS
WITH 1 LEAD FROM METER.
WITH
THE OTHER METER LEAD PROBE 1 OF
THE OTHER
SINGLE METER SHOULD READ 30V
OR 27V
. THE POSITION
OF
THE
DAMPER MOT
OR DETERMINES
THE
VOL
TAGE
YOU
WILL
READ (IT
WILL
BE ONE OR
THE OTHER) IF
THESE
READINGS
ARE OBT
AINED, CHANGE
THE DAMPER MOT
OR.
IF NO
VOL
TAGE PRESENT
, OR
VOL
TAGES
ARE
THE SAME,
CHANGE
THE CONTROL
BOARD.
FAN SPEED DOESN’T
SEEM
T
O
CHANGE
AS SELECTIONS
ARE
MADE ON SELECT
BUTT
ON.
IMPROPER DUCT
SYSTEM INST
ALLED.
ENSURE
THA
T
MOT
OR
AMP
DRA
W
DOES NOT
EXCEED
NAMEPLA
TE RA
TING. INCREASED ST
A
TIC (I.E. DAMPERING)
MA
Y
BE
NECESSAR
Y
.
INCORRECT
VOL
TAGE, MEASURE LINE
VOL
TAGE
&
VOL
TAGE
T
O MOT
OR.
DETERMINE IF IT’S CORRECT
AND CONFIRM
THA
T
VOL
T
METER IS READING CORRECTL
Y
.
ALL
VOL
TAGES MUST
BE
MEASURED
WITH DUCT
SYSTEM
INST
ALLED.
LOW
SPEED
97
VOL
TS
MEDIUM SPEED
105
VOL
TS
HIGH SPEED
120
VOL
TS
IF
THE
VOL
TAGES
ARE CORRECT
THEN
THE DUCT
SYSTEM
ST
A
TIC IS
T
OO LOW
.
CONTROL
BOARD CHANGED
UNIT
DOES NOT
SEEM
T
O RUN
PROPER
TY
DIP
SWITCHES NOT
SET
AS INSTRUCTED
RESET
DIP
SWITCHES
T
O ORIGINAL
SPECIFICA
TIONS.