1200-UP MARINE • INSTALLATION/OPERATION/SERVICE MANUAL • 15.
T R O U B L E S H O O T I N G C H E C K L I S T
F O R C A B I N E T S W I T H E L E C T R O N I C C O N T R O L
TROUBLE
POSSIBLE CAUSE
REMEDY
Unit does not operate.
Insufficient power supply.
Check power source.
Defective power cord or plug.
Check and replace if necessary.
No display in electronic control.
Faulty power supply board.
Check line voltage for 24V across
pins 7 and 8 on the power supply
board and across terminals J9 and J10
on the electronic control.
Faulty electronic control.
Replace control.
Cannot control temperature but
Faulty relay
Replace relay.
sensor and electronic control
checks O.K.
Heating element grounded.
Replace element.
Temperature readout incorrect.
Dirty or faulty sensor.
Check sensor at 32°F (0°C).
Faulty control.
If Ohm reading is 100, replace display.
If Ohm reading is not 100, replace sensor.
T R O U B L E S H O O T I N G C H E C K L I S T
S E R V I C E
D A N G E R
DISCONNECT UNIT FROM
POWER SOURCE BEFORE
CLEANING OR SERVICING.
C A U T I O N
THIS SECTION IS PROVIDED FOR THE ASSISTANCE
OF QUALIFIED SERVICE TECHNICIANS ONLY AND
IS NOT INTENDED FOR USE BY UNTRAINED OR
UNAUTHORIZED SERVICE PERSONNEL.
