Viking DFRD144 Service Manual page 14

Troubleshooting Procedures
To avoid risk of electrical shock, personal injury, or death, disconnect electrical power source to unit, unless test
procedures require power to be connected. Discharge capacitor through a resistor before attempting to service.
Ensure all ground wires are connected before certifying unit as repaired and/or operational.
PROBLEM
LED light flashing amber and no
audible signal heard.
Want to give a customer
demonstration but Show Room Mode
is not enabling.
Compressor, condenser fan, internal
fan(s), heater, reverse gas solenoid,
and alarms are not working but the
display is functioning normally.
E1 error code on display panel and
audible alarm sounding six times
every minute (Compressor fault - high/
low amps).
E2 error code on display panel and
audible alarm sounding six times
every minute (Condenser fan motor
fault - high/low amps).
E3 error code on display panel and
audible alarm sounding six times
every minute (Evaporator thermistor
"sensor B" fault).
E4 error code on display panel and
audible alarm sounding six times
every minute (Display thermistor
"sensor A" fault).
Service Mode is not engaging.
Service Mode disabled automatically.
14
POSSIBLE CAUSE
1. Power Failure alarm.
NOTE: This alarm will occur
upon initial installation which
is normal since the unit was
run at the factory to verify
quality.
1. Did not perform a "Power
On Reset" (POR).
1. Show Room Mode
enabled.
1. Compressor wires
disconnected.
2. Faulty compressor.
3. Faulty control.
4. Faulty compressor
overload.
5. Faulty compressor PTC
starter.
1. Condenser fan motor
wires disconnected.
2. Faulty condenser fan
motor.
3. Faulty control.
1. Disconnected wire
causing open.
2. Shorted thermistor wires.
3. Faulty thermistor.
1. Disconnected wire
causing open.
2. Shorted thermistor wires.
3. Faulty thermistor.
1. Did not press the
"WARMER" and "COLDER"
buttons the correct amount
of times in the allotted time
period.
1. After five minutes of no
keypad entry, Service Mode
will automatically disable.
SMR-0003
CORRECTION
Press the "ON/OFF" button for
approximately one second to reset
audible and display alarms. NOTE:
Although pressing the "ON/OFF" button
will reset the alarms, the alarm will
resume if alarm condition still exists.
To enable, press and hold the "ON/
OFF" button on the display panel while
performing a "Power On Reset" (POR),
i.e. - disconnect and reconnect power
supply to the unit.
To exit, press and hold the "ON/OFF"
button while performing a "Power On
Reset" (POR), i.e. - disconnect and
reconnect power supply to the unit.
Check wiring diagram on back of unit
and reconnect wires.
Replace compressor.
Replace control.
Replace overload.
Replace PTC starter.
Check wiring diagram on back of unit
and reconnect wires.
Replace condenser fan motor.
Replace control.
Check wiring diagram on back of unit
and reconnect wires.
Replace thermistor.
Replace thermistor.
Check wiring diagram on back of unit
and reconnect wires.
Replace thermistor.
Replace thermistor.
To enable, press and hold the
"WARMER" button while pressing the
"COLDER" button four times within five
seconds.
To restart, press and hold the
"WARMER" button while pressing the
"COLDER" button four times within five
seconds.
© Viking Range Corporation