Service manual

7−108
62-11389
Alarm
NO.
Steps Alarm/Cause Corrective Action
248 CONFIGURATION MODE / HP2 ERROR
• TRIGGER–ON: EEPROM configuration is out of range.
• UNIT CONTROL: Shutdown and alarm.
• RESET CONDITION: Auto Reset only when valid info is available for the microprocessor are
entered.
Follow the steps below until a problem is found. Once a repair or correction has been made, clear the alarm(s).
(See Note 1 page 7−2.) Operate the unit through the appropriate modes to see if any active alarm occurs.
Continue with the steps below as necessary.
1 Check microprocessor
a. Check set point setting. Must be between -22 and +89.6°F (-30 and +32°C.)
b. Enter new set point. Must be between -22 and +89.6°F (-30 and +32°C.)
c. Check Functional Parameters. All settings must be valid.
2 Check Software Revision
a. Check microprocessor software
revision.
Upgrade to the latest revision of software. The latest
revision may contain configurations that were not
present in older revisions.
b. Check Functional Parameters All settings must be valid. Send desired settings to
microprocessor using the latest version of
ReeferManager or a PC Card (Do NOT use the
keypad.)
c. Check Configurations All settings must be valid. Send desired settings to
microprocessor using the latest version of
ReeferManager or a PC Card (Do NOT use the
keypad.)
3 Reset microprocessor
a. Place the Main Power switch in the
OFF position for 30 seconds, then
back to the desired position.
Microprocessor powers up OK.
b. Alarm 248 remains active. Download and replace microprocessor. Refer to
Section 5.7.