7–47
62-11637
00132
CHECK DEFROST TERM 2 SENSOR
NOTE
The APX control system uses one Defrost Termination Sensor (DTT) and that sensor will activate this
“CHECK DEFROST TERM 2 SENSOR” alarm.
• ACTIVATION: Defrost Termination Temperature Sensor (DTT) is not within the range of -58 to +266°F (-50
to +130°C).
• UNIT CONTROL: When this alarm is active, the System will use only the SAT for defrost initiation. If both
this alarm and the A00123 (Check Supply Air Sensor) are active the System will use the RAT for initiation. In
either case, defrost will be allowed when the sensor is below 45°F (7.2°C). When this alarm is active defrost
will terminate when the SAT reaches 55°F (12.8°C). If both this alarm and Alarm
are both active, defrost will terminate after ten minutes.
• RESET CONDITION: Auto reset when the sensor is in range or, alarm may be manually reset using the dis-
play mounted keys or by turning the unit off, then back on again.
NOTE: Follow the steps below until a problem is found. Once a repair or correction has been made, the active
alarm should clear itself (refer to reset condition above). Operate the unit through the appropriate modes to see if
any active alarm occurs. Continue with the steps below as necessary.
CORRECTIVE ACTIONS:
1.
Check Sensor
a. Inspect sensor & connector. Verify there is no damage to sensor, and no damage, moisture, or corro-
sion in connector.
b. Check Evap Temp Sensor resistance. (Refer to Note 3 in
Section, page 7-2.) 10,000 Ohms @
77°F (25°C.) See
for complete table of temperatures and resistance values.
2.
Check Sensor Wiring
a. Inspect connector pins & terminals at sensor, EV2 connector and connector 2MM. (See wiring sche-
.) Verify there is no physical damage to harness, and no damage, moisture, or cor-
rosion in connectors.
b. Place the system in PC Mode. Refer to Note 2 in
Section, page 7-2. Disconnect sensor from
harness. Check for 3.0 ± 0.1 VDC volts at harness plug between pins. This verifies microprocessor
output and wiring connections to sensor.
Содержание Transicold X4 7300
Страница 21: ...62 11637 1 6 1 3 SAFETY DECALS ...
Страница 22: ...1 7 62 11637 62 03958 ...
Страница 23: ...62 11637 1 8 ...
Страница 24: ...1 9 62 11637 ...
Страница 119: ...62 11637 SECTION 6 MESSAGECENTER PARAGRAPH NUMBER Page 6 1 MESSAGECENTER MESSAGES 6 1 ...
Страница 278: ......