Table 12 — Benshaw, Inc. Solid-State Starter Troubleshooting Guide
Problem
Probable Causes
Area of Correction
AK board phase cor-
rect not on.
1.
L1 and L3 switch
phases reversed.
2.
Missing phase voltage.
3.
Improper line voltage.
1.
Switch incoming phases L1 and L3 at top of CD1 or
CB1.
2.
Check for missing phase voltage.
3.
Verify proper line voltage applied against synchronizing
transformer voltage.
AK board relay not on.
Ribbon cable not properly
seated.
Check ribbon cable for proper seating. Replace board if
necessary.
AK board power +15
vdc not on.
1.
Improper line voltage.
2.
Transformer
malfunction.
1.
Make sure proper line voltage is present at primary
synchronizing transformer.
2.
Check synchronizing transformer secondary voltage as
follows: On the BC board, measure from TB11-1 to
TB11-2 and TB11-1 to TB11-3. Both readings should
be within 30 to 36 vac. On the BC board, measure from
TB11-1 to TB11-4 and TB11-2 to TB11-4. Both
readings should be within 18 to 24 vac. Replace
synchronizing transformer if voltages are not within the
specified tolerances.
1L boards LEDs not
on.
1.
A short exists between
line and load terminals.
2.
An SCR is shorted in the
phase assembly.
1.
Remove power and check resistance with ohmmeter.
Locate and remove stray wire strands if required.
2.
Remove power. Use ohmmeter to measure the
resistance or each SCR phase assembly from anode to
cathode. The reading should be 50,000 ohm or greater.
If not, replace phase assembly.
BC board over-temper-
ature LED (L3) on
prior to run command.
1.
Temperature switch not
functioning properly.
2.
BC board not
functioning properly.
1.
Disconnect power and check for continuity between
TB11-10 and TB11-11. If no continuity exists, the over-
temperature switch is not functioning properly. Replace
defective switch if necessary.
2.
Make sure BC board is functioning properly. Replace
board if necessary.
BC board LEDs on
prior to run command.
BC board not functioning
properly.
Board not functioning properly. Replace board, if neces-
sary.
BC board LEDs not on
after run command but
before starter reaches
full voltage.
1.
Phase assembly
malfunction.
2.
BC board not
functioning properly.
1.
Remove power and check SCRs. Ohmmeter reading of
each SCR gate to cathode resistance at terminals is 8
to 20 ohm. If not, replace the phase assembly.
2.
Replace board, if necessary.
1L board LEDs remain
on after starter reaches
full voltage.
Imbalance between phases
exists in motor terminal
voltages.
Check for loose SCR gate lead or open SCR gate.
Replace phase assembly, if necessary.
BC board run LED
(L5) not lit.
BC board not functioning
properly.
Measure 24 vdc at TB11-8 to TB11-4. If voltage is present,
replace board. If not present, replace relay 1CR.
Summary of Contents for PC211
Page 317: ...Figure 1 19XL Identification ...
Page 318: ...Figure 2A Front View Typical 19XL Components Design I See next page for Rear View ...
Page 319: ...Figure 2A Rear View Typical 19XL Components Design I ...
Page 320: ...Figure 2B Front View Typical 19XL Components Design II See next page for Rear View ...
Page 321: ...Figure 2B Rear View Typical 19XL Components Design II ...
Page 322: ...Figure 3 Refrigerant Motor Cooling and Oil Cooling Cycles ...
Page 323: ...Figure 4 Lubrication System ...
Page 324: ...Figure 5 Cutler Hammer Solid State Starter Internal View ...
Page 325: ...Figure 6 Benshaw Inc Solid State Starter Internal View ...
Page 326: ...Figure 7 Typical Starter Front View Solid State Starter Shown ...
Page 327: ...Figure 8 19XL Controls and Sensor Locations ...
Page 328: ...Figure 9 Control Sensors Temperature ...
Page 329: ...Figure 10 Control Sensors Pressure Transducer Typical ...
Page 330: ...Figure 11 Control Panel Front View with Options Module ...
Page 331: ...Figure 12 Power Panel with Options ...
Page 332: ...Figure 13 LID Default Screen ...
Page 333: ...Figure 14 LID Service Screen ...
Page 334: ...Figure 15 Example of Point Status Screen Status01 ...
Page 335: ...Figure 16 19XL Menu Structure ...
Page 336: ...Figure 17 19XL Service Menu Structure ...
Page 337: ...Figure 18 Example of Time Schedule Operation Screen ...
Page 338: ...Figure 19 Example of Set Point Screen ...
Page 339: ...Figure 20 19XL Hot Gas Bypass Surge Prevention ...
Page 340: ...Figure 21 19XL with Default Metric Settings ...
Page 341: ...Figure 22 Example of Attach to Network Device Screen ...
Page 342: ...Figure 23 Example of Holiday Period Screen ...
Page 344: ...Figure 25 Typical Wet Bulb Type Vacuum Indicator ...
Page 345: ...Figure 26 19XL Leak Test Procedures ...
Page 346: ...Figure 27 Typical Optional Pumpout System Piping Schematic with Storage Tank ...
Page 347: ...Figure 28 Typical Optional Pumpout System Piping Schematic without Storage Tank ...
Page 348: ...Figure 29 Dehydration Cold Trap ...
Page 349: ...Figure 30 Benshaw Inc Solid State Starter Power Stack ...
Page 350: ...Figure 31 Ramp Up and Starting Torque Potentiometers ...
Page 351: ...Figure 32 Typical Potentiometer Adjustment ...
Page 352: ...Figure 33 Typical Cutler Hammer Solid State Starter ...
Page 353: ...Figure 34 Correct Motor Rotation ...
Page 356: ...Figure 37 Optional Pumpout System ...
Page 357: ...Figure 38 Guide Vane Actuator Linkage ...
Page 358: ...Figure 39 19XL Float Valve Designs ...
Page 359: ...Figure 40 Optional Pumpout System Controls ...
Page 360: ...Figure 41 PSIO Module Address Selector Switch Locations and LED Locations ...
Page 361: ...Figure 42 LID Module Rear View and LED Locations ...
Page 362: ...Figure 43 Processor PSIO Module ...
Page 363: ...Figure 44 Starter Management Module SSM ...
Page 364: ...Switch Setting Option Module 1 Option Module 2 S1 S2 6 4 7 2 Figure 45 Options Module ...
Page 365: ...Figure 46 Typical Benshaw Inc Solid State Starter Internal View ...
Page 366: ...Figure 47 Resistance Check ...
Page 367: ...Figure 48 SCR and Power Poles ...
Page 368: ...Figure 49 Typical Cutler Hammer Solid State Starter Internal View ...
Page 369: ...Figure 50 Cutler Hammer Terminal Functions ...
Page 370: ...Figure 51 Solid State Starter General Operation Troubleshooting Guide Typical ...
Page 373: ...Figure 54 Compressor Fits and Clearances Continued ...
Page 374: ...Figure 55 Compressor Fits and Clearances Continued ...