Error Codes - GE DewPro MMY 245 Installation And Operation Manual

DewPro MMY245
Problem
Display reads high with handle in the bypass
position.
Display has a lightning bolt symbol appears
steady in the display and reading is missing or
doesn't make any sense.
Display reads fine but the lightning bolt symbol
is flashes.

3.2 Error Codes

The following procedure is designed to narrow the search for a problem with the MMY 245. It will not
provide answers regarding all questionable readings since many external influences such as leaks, can
affect the actual readings properly processed and displayed on the unit. Error codes will remain until the
condition is cleared. They will clear automatically when the condition causing the error disappears. For
specific remedies, contact the General Eastern factory field service department by calling 800-33HUMID
(334-8643) for further assistance.
V9 H0
Software errors
Error Description
0 No Error
1* Dew point < -100C
2* Dew point > 20C
4 Voltage output on CH1 scaled to < 0V
8 Voltage output on CH1 scaled to > 5V
16 Temperature out of range
64 Voltage output on CH2 scaled to < 0V
128 Voltage output on CH2 scaled to > 5V
* An error indicating that the dew point is both < -100C and > 20C indicates that the output on CH1 cannot
be calculated because of an error reading the temperature.
V9 H1
Hardware errors
Error Description
0 No error
1 Low battery
2 Sensor shorted
4 Sensor Open
Under many situations more than one error can occur at a given time. To determine which error(s) are
active, use the following algorithm:
1. Find the largest error number on the above table that is smaller than or equal to the error indicated on
the MMY245.
2. Note this error and subtract the value from the MMY245 error code. Return to step one using the
remainder. Continue this process until your remainder is zero.
For example if the error indication is 80 then:
1. 64 is the largest error that fits in 80 so "Voltage output on CH2 scaled to < 0V" is true. Now subtract
64 from 80. The remainder is 16.
16 is the largest error that fits in 16 so "Temperature out of range" is true. Now subtract 16 from 16. The
remainder is 0. This indicates there are no more errors occurring.
GE General Eastern
Installation and Operation Manual
Cause
Desiccant is
expended
Error has occurred
or instrument is off-
scale
Low Batteries
Remedy
Contact Factory
1. Connect to a dry gas
source
2. Consult Error Code Chart
3. Contact the factory
Change batteries.
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