Fri-Jado STG5, Руководство по обслуживанию, Страница: 36 / 74

Page 36 Service Manual STG5/7 intelligent STW5/7 intelligent form 9123999 rev. 05/2010
TROUBLESHOOTING
Description of part Symptoms Possible causes Solving: checking/action
PT-sensor Temperature indication on
display of 317°C / 603°F no connection
between wires. Check the wiring.
Check thin wire on sensor.
Temperature indication on
display does not go up Full contact
between wires of
sensor. Check the wiring.
Short circuit in
sensor. Measure resistance of sensor. This
is zero.
Rotisserie does not reach
adjusted temperature Malfunction sensor. Measure resistance of sensor with
a thermometer probe next to the
sensor. See table in this manual.
Sensor not in right
position. Check position of sensor
Temperature indication on
display runs up too fast Malfunction Sensor Measure resistance of sensor. See
table on page 30.
Safety thermostat Contactor does not
come in after starting of
program Wiring. Check the wiring.
Thermostat mal-
function. Check if the thermostat is making
contact.
Contactor switches off
before reaching the
adjusted temperature in
program Thermostat mal-
function. Check if the thermostat is turned
fully clockwise (contact closed).
Thermostat probe
not in right posi-
tion. Check the position of the thermo-
stat probe.
Contactor Contactor does not come
in Wiring. Check the wiring.
Coil malfunction. Check resistance of the coil. This
should be ~ 525Ω.
Contact burned. Check the contacts of the contactor
Capacitor Drive motor or blower do
not work Wiring. Check the wiring.
Capacitor malfunc-
tions. Check function after connecting a
new capacitor.
Checking of capacitor:
Discharge capacitor with screwdriv-
er. Set meter on MΩ and connect
the pins of the meter on contacts,
value runs up. Change the pins on
contacts, value runs up again. This
means the capacitor is OK.
keypad(s) on operation
panel no possibility to make a
program One or more keys
don’t function. Check functions of keypad(s). See
keypad test in this manual.
Check flat cable connection on CPU
board.
Check flat cable.
Check if keypad is correctly glued
to the glass.