Trane CVRC-M-1D Manual page 105

Diag
Diagnostic Description
Type
Purge Cprs Suction Temp
IFW
Sensor
Purge Liquid Level Too High IFW
Purge Memory Error III
This diag will be seen in
UCP2 applications of the
Purge Module. This diag will IFW
not be seen in retrofit
applications of the Purge
Module.
Purge Memory Error Type I:
NOVRAM
This diag should be seen in IFW
both UCP2 and retrofit
applications only.
Purge Memory Error Type II:
Shadow RAM
IFW
This diag should be seen in
retrofit applications only.
Purge Memory Error Type III:
This diag should be seen in IFW
retrofit applications only.
Purge Memory Error Type IV IFW
Purge: Loss of Comm with
IFW
Chiller
CVRC-M-1D
Diagnostics Tables
Diag Active
Modes
Cause
(Non-Active
Modes)
Open or Shorted Sensor
All
a. IFW to the chiller, MMR to the Purge.
a. The level switch at the purge opened for 6 to 10
All seconds.
b. IFW to the chiller, MMR to the purge.
a. A Shadow RAM memory error was detected.
Compressor starts and hours were lost for not more
than the last 24 hours. This is expected to be an
All isolated event and repair or replacement is not required.
If this diagnostic does occur repeatedly, then replace
the Purge module. This is an IFW diagnostic to both
the Purge and Chiller.
A. On either Purge Module power up or following a
Type II Memory Error, a NOVRAM memory error was
detected. The Purge Module is operating on all
On Purge
Engineering ROM defaults for all setup parameters.
Power Up or
Check all setup parameters and continue to run purge.
following a
Replace the Purge Module as soon as a replacement is
Type II
available.
Memory
Note: It is expected that this diagnostic will be detected
Error diag.
on the very first power up of the Purge Module at the
manufacturer since the NOVRAM will not contain valid
data on first power up.
A shadow RAM memory error was detected. The
Purge Module 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
All 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 Purge Module.
A shadow RAM memory error was detected. The
Purge Module 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
All
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 Purge Module.
A page timeout error was detected while trying to write
data into EEPROM. There will likely be a recall of
All engineering ROM defaults on the next reset or power
transition. Replace the Purge Module as soon as a
replacement is available.
The purge module lost communications with the chiller
All module for 15 contiguous seconds.
a. IFW to the chiller, MAR to the Purge.
Help Message
Purge Inop: see Purge O &
M Manual
Purge Inop: see Purge O &
M Manual
No Settings Lost
Purge Inop: see Purge O &
M Manual
No Settings Lost
Settings changed in the last
24 hours lost
See Purge O & M manual
Check IPC
Wiring/Connections
105