Diagnostics Menu
Information Manual 71
Free Cooling Valves MMR Options When
exiting
Free
cooling
a. The Free Cooling Valves were commanded to
close and did not close in the three minutes
allowed for closure. And FC is installed (at the
CLD) and commanded off.
b. The Free Cooling Valves were commanded to
open and did not open in the three minutes
allowed for closure. And FC is installed (at the
CLD) and commanded On.
Check Clsd End-
Switches,
Valves, Wiring
Heat Sink Temp Sensor IFW Starter All Open or Short and Solid State Starter installed.
Note: The Solid State Starter is expected to be
protected from overheating via a thermal cutout.
Since this sensor is not used to protect the
starter, the failure of the sensor is treated as an
IFW.
Check Sensor
Wiring And
Connections
HGBP Valve Closure Overdue IFW a. The HGBP Valve was commanded to close
and did not close in the three minutes allowed for
closure
Check Clsd End-
Switches,
Valves, Wiring
High Bearing #1 Temp MMR Stepper All
starting
and
running
modes
a. The bearing temperature at sensor #1
exceeded 180 + or - 5 °F (82.2 °C) for 0.5 - 2
seconds (Note: BT, WT, and DT may be
“instantaneous trip” but consistent with the
analog input filtering function.), and
b. This function is enabled at the CLD.
Check Oil
System
High Bearing #2 Temp MMR Stepper All
starting
and
running
modes
a. The bearing temperature at sensor #2
exceeded 180 + or - 5 °F (82.2 °C) for 0.5 - 2
seconds (Note: BT, WT, and DT may be
“instantaneous trip” but consistent with the
analog input filtering function.), and
b. This function is enabled at the Human
Interface.
Check Oil
System
High Cprsr Discharge Temp. MAR Stepper All a. The discharge temp. exceeded the trip value;
200°F + or - 5°F for CVHE/F, CVG and CVA.
The Discharge Temp Cutout is adjustable at the
Human Interface. See also section
P4_CPRSR.Doc of this Functional Specification.
b. Time to trip from trip value exceeded shall be
0.5 to 2.0 seconds. (Note: BT, WT, and DT may
be “instantaneous trip” but consistent with the
analog input filtering function.)
d. The diag. shall reset automatically 50 °F
below the trip point.
See
Troubleshooting
Service Bulletin
High Motor Temp Position #1 MMR Circuit Any Start
and Run
Mode
The Motor winding temp. at sensor #1 exceeded
265 °F + or - 15°F for 0.5 - 2 seconds. (Note: BT,
WT, and DT may be “instantaneous trip” but
consistent with the analog input filtering
function.)
See
Troubleshooting
Service Bulletin
High Motor Temp Position #2 MMR Circuit Any Start
and Run
Mode
The Motor Winding Temp. at sensor #2
exceeded 265 °F + or - 15 °F for 0.5 - 2 seconds.
(Note: BT, WT, and DT may be “instantaneous
trip” but consistent with the analog input filtering
function.)
See
Troubleshooting
Service Bulletin
High Motor Temp Position #3 MMR Circuit Any Start
and Run
Mode
The Motor Winding Temp. at sensor #3
exceeded 265° F + or - 15° F for 0.5 - 2 seconds.
(Note: BT, WT, and DT may be “instantaneous
trip” but consistent with the analog input filtering
function.)
See
Troubleshooting
Service Bulletin
DIAGNOSTIC DESCRIPTION
Diag
Type
Module
that
Called
Diag.
Diag.
Active
Modes
CAUSE Help Message
To Next Page
Loading...
Need help?
General
