62-11637
7–40
00093
CHECK STARTUP BUZZER
• ACTIVATION: The Buzzer (B) circuit is shorted or open. (The Buzzer output from the microprocessor
[PCM-23 to 3MM15] is negative, so the circuit will not be shorted to ground, but is shorted either within the
Buzzer itself, or to a positive wire.)
• UNIT CONTROL: Alarm only.
• RESET CONDITION: Auto reset when Buzzer amp draw is normal, or alarm may be manually reset using
the display 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 Buzzer
a. Inspect Buzzer & wire connections. No damage to buzzer. No damage or corrosion.
b. Check resistance of buzzer. Cannot be opened (infinite ohms) or shorted (Zero Ohms).
c. Use Component Test Mode (Refer to
) to test actual current draw of the circuit. Buzzer
provides audible signal. View current draw in Component Test Mode screen. Verify the actual cur-
rent is within the specifications.
2.
Check Buzzer Wiring
Inspect PCM sub-harness connector pins & terminals. (See wiring schematic
.) Verify there
is no physical damage to harness, and no damage, moisture, or corrosion in connectors.
3. Is the component functioning? Are there additional alarms?
a. If the component is functioning, and additional alarms are present (often within 3MM01 - 3MM12 or
3MM13 - 3MM18) check related fuses, wires, and connectors.
b. If the fuses/wires/connectors are OK, it indicates an internal problem with the MM or the PCM.
Download data and replace main microprocessor. For complete Main Microprocessor Module
replacement instructions refer to
.
c. If problem persists reinstall the old MM, and replace the PCM. Refer to
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: ......