62-11637
7–42
00122
CHECK RETURN AIR SENSOR
• ACTIVATION: Return Air Temperature Sensor (RAT) is not within the range of -53 to +158°F (-47 to +70° C).
• UNIT CONTROL:
If Alarm 00123 is not active: Alarm and switch to supply air control.
If Alarm 00123 is active: Alarm and the System will enter Cargo Protect Mode. Refer to
• RESET CONDITION: Auto reset when 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.
1.
Check Sensor
a. Inspect sensor & connectors. Verify there is no damage to sensor, and no damage, moisture, or cor-
rosion in connectors.
b. Check sensor resistance. (Refer to Note 3 in
Section, page 7-2.) 10,000 Ohms @ 77°F
for chart of resistances for different sensors.
2.
Check Sensor Wiring
a. Inspect connector pins & terminals at sensor connector 2MM. (See wiring schematic
Verify there is no physical damage to harness, and no damage, moisture, or corrosion 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 at harness plug between pins. Voltage should be 3.0 ± 0.1 VDC
volts at harness plug between pins. This verifies microprocessor output and wiring connections to
the sensor.
00123
CHECK SUPPLY AIR SENSOR
• ACTIVATION: Supply Air Temperature Sensor (SAT) is not within range of -53 to +158°F (-47 to +70° C).
• UNIT CONTROL:
If Alarm 00122 is not active: Functional Parameter Temperature Control is set for Supply Air and the
setpoint is in the perishable range: Alarm and switch to return air control.
If Alarm 00122 is active: Alarm and the System will enter Cargo Protect Mode. Refer to
• RESET CONDITION: Auto reset when sensor is in range or, alarm may be manually reset using the dis-
play mounted keys or by turning the unit off and 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 & connectors. Verify there is no damage to sensor, and no damage, moisture, or cor-
rosion in connectors.
b. Check sensor resistance. (Refer to Note 3 in
Section, page 7-2.) 10,000 Ohms @ 77°F
for chart of resistances for different sensors.
2.
Check Sensor Wiring
a. Inspect connector pins & terminals at sensor connector 2MM. (See wiring schematic
Verify there is no physical damage to harness, and no damage, moisture, or corrosion 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 the sensor.
Summary of Contents for Transicold X4 7300
Page 21: ...62 11637 1 6 1 3 SAFETY DECALS ...
Page 22: ...1 7 62 11637 62 03958 ...
Page 23: ...62 11637 1 8 ...
Page 24: ...1 9 62 11637 ...
Page 119: ...62 11637 SECTION 6 MESSAGECENTER PARAGRAPH NUMBER Page 6 1 MESSAGECENTER MESSAGES 6 1 ...
Page 278: ......