Refrigeration unit
operation stops
Alternator charge is abnormal.
Discharge refrigerant gas
temperature is abnormal.
Refrigeration unit
operation stops
Refrigeration unit
operation stops
Defrost sensor is faulty.
Alarm
Code
Error Contents Measures
Normal display
The refrigeration unit is normal.
Refrigeration
Unit State
Refrigeration unit
operation stops
Alarm
Code
Error Contents Measures
Evaporator fan motor fuse is blown.
Refrigeration
Unit State
Refrigeration unit
operation stops
List of alarm codes (If the alarm display blinks)
List of alarm codes (If there is no alarm display )
ADVICE
(1) Always use genuine fuses, and always replace fuses with a fuse of equal capacity.
(2) Alarm codes are displayed repeatedly at 2-second intervals beginning with the most
recent alarm and continuing in order of occurrence.
(3) If the code in *1 is abnormal, the unit stops and the alarm display blinks, but if the unit
fails to return to normal by auto recovery (restarting), the code lights up continuously and
stops blinking.
(4) If the code in *2 is abnormal, the unit stops and the alarm display blinks. Then after 10
seconds, an attempt is made to start the unit up to 2 times. If it does not return to normal,
the code lights up continuously and stops blinking.
(5) After taking the necessary measures to get the refrigeration unit running again, turn the
RUN/STOP switch to the “RUN” position.
30
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Troubleshooting
One of the fuses for the evaporator fan motor has blown.
Inspect and replace the fuses F2 to F4 (TNW4EA: F2 to
F3) in the control box.
The discharge refigerant gas temperature is abnormal.
Inspect the sight glass. If bubbles are apparent, the
refrigerant gas is low. Contact your dealer.
The alternator’s charge is faulty.
Contact your dealer or the nearest service shop.
The defrost sensor has a broken wire, has short circuited,
or there is a contactor contact defect.
Inspect the lead wire and connector. If an abnormal state
is found, contact your dealer.
If a display does not appear, or if a sign other than the above 5 types appears, contact your dealer.
Sub-engine high-speed solenoid
fuse is blown.
Refrigeration unit
operation continues
The high-speed solenoid fuse for the sub-engine has blown.
Inspect and replace the fuses F6 in the control box.
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