Watlow Series 734 Program - Manual (Page 13)

Alarms & Error Codes, Chapter 5 WATLOW Series 733/734 Program Manual
13
Error Codes
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WARNING:
Electrical noise or a
noise event, excess
environmental
moisture or tem-
perature, or vibra-
tion may cause
Series 733/734
errors to occur. If
the cause of an
error is not other-
wise apparent,
check for these.
Table 2 -
Error Code
Troubleshooting
˜
NOTE:
For Er06 through
Er09, always check
the sensor and
connections for a
reversed or open
sensor before
trying the solution
listed.
Er01 -
ROM (Read Only
Memory) checksum error
Er02 -
RAM (Random Access
Memory) checksum error
Er03 -
Ambient sensor error
Er04 -
Configuration error
Er05 -
EEprom error
Er06 -
Zone 1 A/D (Analog to
Digital Converter) Under-
flow error
Er07 -
Zone 1 A/D overflow error
Er08 -
Zone 2 A/D (Analog to
Digital Converter) Under-
flow error
Er09 -
Zone 2 A/D overflow error
Problem Probable Cause
Internal ROM is
defective.
Internal RAM is defective.
Ambient temperature is
below 32°F/0°C
Factory calibration
parameters have been
altered.
Defective microprocessor
Power loss while storing
data.
• Incorrect sensor type
• Measuring temperature
outside the sensor
range
• Reversed sensor leads
Open sensor
• Incorrect sensor type
• Measuring temperature
outside the sensor
range
Open sensor
Solution
• Cycle power
• Cycle power
• Check ambient tem-
perature at the control.
• Restore factory
calibration parameters.
See Calibration section.
• Cycle power
• Cycle power
• Check the InP1 para-
meter. Verify it
matches your sensor.
• Check the InP1 para-
meter. Verify it
matches your sensor.
• Check the InP2 para-
meter. Verify it
matches your sensor.
• Check the InP2 para-
meter. Verify it
matches your sensor.
To mask an alarm …
• When the SIL parameter is ON…
• Press the Temperature key . This masks or "snoozes" the alarm message
for 30 seconds, and energizes the alarm output relay.
• When the SIL parameter is OFF…
• Press the Temperature key . This masks or "snoozes" the alarm message
for 30 seconds, but does not energize the alarm relay.
Error Code Messages
The error code is visible in the display and alternates with the current display at a
3 second rate. The list below outlines the standard error codes associated with
the Series 733/734. They are designed to isolate specific problem areas and aid
in troubleshooting your control. If the problem persists, consult the factory.