Carrier VECTOR 6500 Operation & Service Manual page 230

Alarm
Steps
NO.
P209 CHECK STANDBY CONT CIRCUIT
•
TRIGGER–ON: Normal amps for the PSCONR relay coil and PSCON or PSCON2 contactor coils
0.0 to 1.0 Amps (12 VDC). The circuit(s) test outside this range. (During this test either PSCON or
PSCON2 will be tested depending on the phase reversal module.)
•
UNIT CONTROL:
•
RESET CONDITION: Auto Reset if Pretrip is started again, or alarm may be manually reset via
keypad or by turning the unit off, then back on again.
NOTE: Follow the steps below until a problem is found. Once a repair or correction has been made, clear the
alarm(s). (See Note 1 page 7−2.) Operate the unit through the appropriate modes to see if any active alarm
occurs. Continue with the steps below as necessary.
NOTE: IF PRETRIP IS DONE IN STANDBY MODE, THIS PRETRIP ALARM WILL GENERATE MANY
OTHER PRETRIP ALARMS. THEREFORE, IT SHOULD BE ADDRESSED FIRST
1
Check PSCONR
a. Inspect PSCONR, PSCON and
PSCON2 contactor coils and wire
connections.
b. Check contactor coil resistance.
2 Check PSCONR, PSCON, and PSCON2 Amp Draw
a. Check PSCONR, PSCON and
PSCON2 contactor coils amp draw.
b. Listen for PSCON or PSCON2 to
pull in.
3 Check PSCONR, PSCON, PSCON2 and PRM Wiring
Inspect harness & control box con-
nector pins & terminals. (See wiring
schematic Section 10.)
Alarm/Cause
Engine and Standby Operation: Pretrip will fail and display
"PRETRIP FAIL AND COMPLETED".
7−97
Corrective Action
No damage to coils.
No damage, moisture, or corrosion in connections.
Refer to Section 2.12 for resistance values
Use Component Test Mode (Section 5.2.2) to test.
Refer to Section 2.12 for amp values. View current
draw in Data List. FET 19 On.
If PSCON or PSCON2 contactor pulls in, PSCONR
and PSCON or PSCON2 are OK.
If PSCON or PSCON2 contactor does not pull in,
check for 12 VDC at Phase Reversal Module (PRM)
"N" terminal. 12 VDC indicates defective PSCON or
PSCON2 coil. No voltage - check PSCONR and
PRM.
No physical damage to harness.
No damage, moisture, or corrosion in connectors.
62-11389