Diagnostics Menu
66 CVHE-CLD-1A
Chilled Water Flow Lost MAR Chiller Chilled
Water
Control:
(All Stop
modes)
All modes
except
STOP
(00) and
EXTERN
AL STOP
(100)
Hot
Water
Control:
Start and
All Run
Modes.
a. The chilled water flow switch input was open
for more than 6-10 contiguous seconds.
b. 6-10 seconds of contiguous flow shall clear
this diagnostic.
c. Even though the pump times out in the STOP
modes, this diagnostic shall not be called out in
the STOP modes.
Check Pump,
Valves, Flow
Switch
Chiller: Loss of Comm with
Purge
IFW Chiller All The chiller module lost communications with the
Purge module for 15 contiguous seconds.
Check IPC
Wiring/
Connections
Chiller: Loss of Comm with
Starter
MMR Chiller All The chiller module lost communications with the
Starter module for 15 contiguous seconds.
Check IPC
Wiring/
Connections
Chiller: Loss of Comm with
Options
IFW Chiller All The chiller module lost communications with the
Options module for 15 contiguous seconds. This
IFW diagnostic is generated if Free Cooling is
Not Installed, otherwise this is an MMR diag.
under code 2F6
Check IPC
Wiring/
Connections
Chiller: Loss of Comm with
Circuit
MMR Chiller All The chiller module lost communications with the
Circuit module for 15 contiguous seconds.
Check IPC
Wiring/
Connections
Chiller: Loss of Comm with I/O
Mod
IFW Chiller All The chiller module lost communications with the
I/O module for 15 contiguous seconds; And
HGBP is installed (at the CLD).
Check IPC
Wiring/
Connections
Chiller: Loss of Comm with I/O
Mod
MMR Chiller All The chiller module lost communications with the
I/O module for 15 contiguous seconds; And
Pulsed IGV is installed (at the CLD).
Check IPC
Wiring/
Connections
Chiller: Loss of Comm with DCM IFW Chiller All The DCM was setup as “installed” at the CLD
and the chiller module lost communications with
the DCM module for 15 contiguous seconds
Check IPC
Wiring/
Connections
Chiller: Loss of Comm with
Stepper #1
MMR Chiller All The chiller module lost communications with the
Stepper #1 module for 15 contiguous seconds.
Check IPC
Wiring/
Connections
Chiller: Loss of Comm with
Local CLD
Note: As implemented this is a
latching IFW diagnostic. That is,
once generated it cannot be re-
generated until a manual reset
is done.
IFW-AR Chiller All The chiller module lost communications with the
LCLD module for 15 contiguous seconds.
Check IPC
Wiring/
Connections
Chiller: Loss of Comm with
Options
MMR Chiller All The chiller module lost communications with the
Options module for 15 contiguous seconds. This
MMR diagnostic is generated if Free Cooling is
Installed, otherwise this is an IFW diag. under
code 2AE
Check IPC
Wiring/
Connections
DIAGNOSTIC DESCRIPTION
Diag
Type
Module
that
Called
Diag.
Diag.
Active
Modes
CAUSE Help Message
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