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Diagnostics Menu
DIAGNOSTIC DESCRIPTION
Max Acceleration Setpts
Error
Max Pumpout Rate Exceeded-
Svc (Prg)
Max Pumpout Rate Exceeded
(Prg)
Memory Error Type I: NOVRAM
Memory Error Type IV
Memory Error Type II: Shadow
RAM
Memory Error Type III
74
Diag Module Diag.
Type that Active
Called Modes
Diag.
IFW Starter All
IFW Purge All
IFW Purge All
MMR Chiller On UCM
Power Up
or
following
a Type II
Memory
error
diag.
IFW Chiller All
IFW Chiller All
IFW Chiller All
CAUSE
a. The redundant Maximum Acceleration
settings did not agree for 30 contiguous
seconds. (Continue to use the previous value for
the 30 second timeout.) When this diagnostic
occurs the affected Starter Module shall use 6
seconds as a default until either the UCM is
reset or, if the redundant settings agree again,
the starter module can go back to using the
actual setting.
a. IFW to the chiller, MAR to the Purge.
a. IFW to the chiller, MAR to the Purge.
a. On UCM either power up or following a Type II
Memory Error a NOVRAM memory error was
detected. The UCM is operating on all
Engineering Factory defaults for all setup
parameters. Check all setup parameters and
continue to run chiller. Replace the Chiller
Module as soon as a replacement is available.
Note: It is expected that this diagnostic will be
detected on the very first power up of the Chiller
Module at the Manufacturer since the NOVRAM
will not contain valid data on first power up.
A page timeout error was detected while trying to
write data into EEPROM. There will likely be a
recall of Engineering Factory defaults on the
next reset or power transition. Replace the
Chiller Module as soon as a replacement is
available.
a. A Shadow RAM memory error was detected.
The UCM is operating on all last valid values
(pulled from NOVRAM) for all setup parameters.
No setup parameter changes were pending to be
loaded into NOVRAM, a complete recovery of all
setup parameters was made and there is no
need to check unit setup parameters.
Compressor starts and hour were lost for not
more than the last 24 hours. This is expected to
be an isolated event and repair or replacement is
not required. If this diagnostic does occur
repeatedly, then replace the Chiller module.
a. A Shadow Ram memory error was detected.
The UCM is operating on all last valid values
(pulled from NOVRAM) for all setup parameters.
Setup parameter changes less than 24 hours old
pending to be loaded into NOVRAM were lost.
Check all setup parameters made in the last 24
hours. Compressor starts and hours were lost for
not more than the last 24 hours. This is expected
to be an isolated event and repair or
replacement is not required. If this diagnostic
does occur repeatedly, then replace the Chiller
module.
Help Message
Review Max
Acceleration Set
Up
Purge Inop: See
Purge O & M
Manual
Purge Inop: See
Purge O & M
Manual
Call Service to
Check all
Settings
Call Service to
Check all
Settings
No Settings
Were Lost
Settings
Changed in The
Last 24 Hours
Lost
CVHE-CLD-1A