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3.10 MANUAL DEFROST
1. With the system powered up (START/RUN-OFF switch in the START/RUN position) press the MANUAL
DEFROST key.
NOTE
This procedure may be demonstrated in PC Mode but the unit will not actually enter defrost
2. If the conditions for defrost are met, the status bar and the Box Temperature display will change to the word
“DEFROST”. The MessageCenter will display “DEFROST CYCLE STARTED” for 10 seconds. At the com-
pletion of any defrost cycle, the MessageCenter will return to the default display.
3. If the conditions for defrost are not met, the MessageCenter will display “CANNOT START DEFROST
CYCLE” for 5 seconds. This message will be activated when:
• The box temperature is too warm. Defrost may be entered when the defrost termination temperature sen-
sor (DTT) is below 40°F (4.4°C) or the supply air temperature sensor (SAT) is below 45°F (7.2°C)
OR
• The engine has not run at least 15 seconds after starting
OR
• The unit is in PC Mode
OR
• The unit is in Pretrip
OR
• There is an active shutdown Alarm.
Defrost may also be initiated automatically at preset intervals by the system defrost timer or by the defrost air
switch.
The Defrost Mode terminates when both the defrost termination temperature (DTT) and supply air temperature
(SAT) rise higher than 55°F (12.8°C). Should the defrost cycle not end after a maximum of 45 minutes the defrost
cycle is terminated automatically. The A00054 – DEFROST NOT COMPLETE alarm will be activated.
If the alarm is activated, the system will wait 1.5 hours of unit running time before attempting an automatic defrost
cycle. Pressing the manual defrost key will override this mode and start a defrost cycle.
TIP
The Manual Defrost Key can be used at any time to start a Defrost Cycle as long as the preceding
conditions are met.
NOTE
Refer to
for more detailed information on DEFROST.
CONTINUOUS
START/STOP
MENU
ALARM
COOL
DIESEL
START/STOP
INTELLISET
Viewing Menu Soft Key
Selections
Press Menu Key to Scroll
PRETRIP HOUR
METERS
UNIT
DATA
DEFROST
DEFROST
DIESEL
START/STOP
DEFROST CYCLE STARTED
25
SETPOINT F
DEFROST
1
2
2
Содержание Transicold X4 7300
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