Mitsubishi TDJ300D, Руководство по обслуживанию

Страница: 55 / 91

(f) Defrost operation
1) In case the unit will not defrost.
– 55 –
Is 2 terminal of
controller 0V?
Change time on
defrost timer (Refer
to page 7.)
YES
Check time on
defrost timer.
Normal
NO (In case battery voltage)
Established value of defrost thermostat
ON: 0
°
C
OFF: 8
°
C
Normal
Normal if it will
not start defrosting.
Is storage
temperature under 0
°
C?
NO
YES
2
terminal RY and G lines are
broken or contact of connector
is defective.
• AR
5
relay is defective.
• LY and G lines between SV
1
and relay box (AR
5
) are
broken or contact of
connector is defective.
Replace defrost
thermostat.
Controller is defective.
Defrost thermostat
Abnormal
(It is not “ON”
under 0
°
C)
Normal
It will not defrost.
Is battery
voltage measured at LR
line of defrost at LR line of defrost
electromagnetic valve (SV
1
)
connector?
NO
LR line between AR
1
~ SV
1
is
broken or contact of connector
is defective.
YES
NO
Defective electromagnetic
valve (SV
1
) is defective.
YES
Is battery
voltage measured at
BR line of AR
5
coil?
NO
Controller is defective.
YES
NO
BR line between controller and
relay box AR
5
is broken or
contact of connector is
defective.
YES
Is battery
voltage measured at
LY line of defrost
electromagnetic valve
connector?
Is
P
terminal of
controller under 0.5V?