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JOHNSON CONTROLS

SECTION 8 – MAINTENANCE AND TROUBLESHOOTING

FORM 160.00-O2

ISSUE DATE: 04/30/2019

FIGURE 9 -

LCSSS – POWER COMPONENTS

00286VIP

COOLANT

PUMP

CONDUIT

OIL

PUMP

CONDUIT

SCR

ASSEMBLY

(1 OF 3)

RESISTOR

AND

CAPACITOR

ASSEMBLY

INPUT

BUS BAR

10. Remove the four SCR/heatsink assembly mount-

ing nuts from the mounting studs and remove the

entire SCR/Heatsink assembly.

11. Remove resistor and capacitor assembly from de-

fective SCR assembly. Save these parts; they will

be needed for the new SCR assembly. (Refer to

Figure 9 on page 39

)

INSTALLING SCR ASSEMBLIES

1. Install new plastic hose barbs into the new SCR

assembly. Use Teflon tape on threads of the hose

barbs.

2. Install resistor and capacitor assembly onto the

SCR assembly.

3. Install SCR assembly into the starter and tighten

the 4 mounting bolts.

4. Install the coolant hose over the hose barbs, and

tighten the hose clamps (tubing must not contain

any kinks).

5. On 7L and 14L models, it is necessary to clean

the mating surfaces of the SCR assembly and in-

put bus bar with fine emery cloth or Scotchbrite

pad and coat with a thin film of thermal joint com

pound (013-02880-000) before attaching the in-

put bus bar. Torque the two bolts to 13-17 ft.-lbs.

6. On 26L and 33L models, clean the mating sur-

faces of the SCR assembly and input bus bar with

fine emery cloth or Scotchbrite

pad. Torque the

two bolts to 13-17 ft.-lbs.

7. Install the current transformer mounting bracket

by inserting the four screws on the back of the

starter.

8. Install the output wires from the motor.
9. Connect the thermistor wire connector for the

new SCR (J/P16, J/P17, J/P18).

10. Install Logic/Trigger Board assembly by install-

ing 4 panel mounting screws and the 6 screws

holding the gate wire clamps. Install all electrical

connections to the Logic/Trigger Board.

11. Fill the coolant loop as directed in the Fill Cool-

ing Loop Section in this form.

The starter is now ready to be restarted.

Содержание SSS 14L-B

Страница 1: ...LE B NOTE Unless otherwise noted information in this instruction is applicable to all style starters of the same size Example 26L B and 26LK B 00282VIP LIQUID COOLED SOLID STATE STARTER OPERATION Supe...

Страница 2: ...this document and any referenced materials This in dividual shall also be familiar with and comply with all applicable industry and governmental standards and regulations pertaining to the task in que...

Страница 3: ...tion Unit Model YT Style G or Later Centrifugal 160 55 O1 Operation Unit Model YK Style E or Later Centrifugal 160 54 O1 Operation Unit Model YS Style E or Later Screw Chiller 160 80 NOM1 Operation Un...

Страница 4: ...JOHNSON CONTROLS 4 FORM 160 00 O2 ISSUE DATE 04 30 2019 THIS PAGE INTENTIONALLY LEFT BLANK...

Страница 5: ...HUTDOWNS 21 General Information 21 105 Motor Current Overload 21 High Temperature 21 High Instantaneous Current 21 Open SCR 22 Output Current Imbalance 22 Phase Rotation 22 Shorted SCR 23 SECTION 5 CY...

Страница 6: ...5 Coolant Maintenance 35 Troubleshooting The Closed Loop Coolant Pump 35 Troubleshooting Processes 35 Verify Shorted SCR 36 Verify Open or Shorted SCR Gate 36 Verify Gate Driver Output 36 Verify Real...

Страница 7: ...r Section 16 FIGURE 6 LCSSS Logic Trigger Board Detail 18 FIGURE 7 Logic Trigger Board Pin Location Diagram 20 FIGURE 8 Current Imbalance Due To Voltage Imbalance 37 FIGURE 9 LCSSS Power Components 39...

Страница 8: ...JOHNSON CONTROLS 8 FORM 160 00 O2 ISSUE DATE 04 30 2019 THIS PAGE INTENTIONALLY LEFT BLANK...

Страница 9: ...n is a description of the operation start up and troubleshooting of the Style B YORK LCSSS It should be read thoroughly before servicing this product Due to the integration of the Solid State Starter...

Страница 10: ...46 440 460 480 371 02506 109 14L 58 550 575 600 371 02506 110 14L 50 380 400 415 50Hz 371 02506 111 26L 17 200 208 371 02507 102 26L 28 220 230 240 371 02507 103 26L 46 440 460 480 371 02507 104 26L 4...

Страница 11: ...re In order to reduce size of the starter the cooling to the SCR assemblies is provided by a water to water heat exchanger between the chiller condenser water loop and the coolant in the closed loop T...

Страница 12: ...cur rent drops off the VCON value increases and the PLD turns the SCRs full on The output of the PLD is sent to a digital driver chip and then to six optical couplers one for each SCR The optical coup...

Страница 13: ...h the heat exchanger it gives up its heat to the system condenser water that is flowing through the in ner tube of the tube in tube heat exchanger The design of the heat exchanger prevents the closed...

Страница 14: ...oved and the Logic Trigger Board will function properly regardless of whether the starter is connected to the utility or gen erator power MOTOR PROTECTION Compressor motor protection circuits are prov...

Страница 15: ...ses Circuit Breaker or Disconnect Switch if used A control power transformer is attached to the side of the starter enclosure This supplies 115 VAC control power to the starter and OptiView Control Ce...

Страница 16: ...S 16 FORM 160 00 O2 ISSUE DATE 04 30 2019 SECTION 2 SYSTEM ARCHITECTURE Figure 5 LCSSS INTERIOR POWER SECTION SCR GATE LEADS SCR HEATSINK ASSEMBLIES INPUT BUS BARS SCR GATE LEADS OUTPUT CURRENT TRANSF...

Страница 17: ...ing code is determined by how jumpers are arranged on the J1 connector on the Logic Trigger Board Also each model size of starter uses a different CT ratio See Table 2 on page 17 Since these jumpers...

Страница 18: ...ating satis factorily and the contacts will open when the LCSSS initiates a Cycling or Safety shutdown These contacts will remain open until the cause of the shutdown has been rectified Relay K2 contr...

Страница 19: ...11 Part of current transformer connector interlock circuit J1 12 Part of current transformer connector interlock circuit J2 PINS J2 1 Phase A SCR assembly thermistor input Refer to Table 6 for voltag...

Страница 20: ...53 115 VAC supply voltage from the OptiView Control Center for the Stop Contact Measure 115 VAC to J5 2 whenever power is applied TB1 3 24 Run Stop connections from the OptiView Control Center Measure...

Страница 21: ...lue of current exceeds this threshold a 40 second time is started If this value of current is main tained for a period of 40 seconds a Safety shutdown will occur The shutdown message displayed will be...

Страница 22: ...m on screw compressors Verify that the motor is connected Verify that the gate of the SCR is not open Check for an open input fuse OUTPUT CURRENT IMBALANCE This shutdown will become active after the s...

Страница 23: ...oss the SCRs via an opto coupler If the output of the opto coupler is low implying the SCR is turned on or short ed for 5 continuous seconds and the RMS phase volt age for that phase is approximately...

Страница 24: ...JOHNSON CONTROLS 24 FORM 160 00 O2 ISSUE DATE 04 30 2019 THIS PAGE INTENTIONALLY LEFT BLANK...

Страница 25: ...hutdown thresholds in the chart below If the input voltage exceeds the shutdown threshold for 20 continuous seconds then a Cycling shutdown will occur This shutdown is disabled for the first 20 second...

Страница 26: ...Check for possible input power problems LOGIC BOARD PROCESSOR A watchdog type of system is used to determine if the main system microprocessor and the DSP are still communicating Normally the main sys...

Страница 27: ...omes too large then the synchronization with the A phase voltage will be lost If synchronization is not maintained the SCRs will misfire and damage the chiller The shutdown message displayed will be L...

Страница 28: ...processor where it is compared with a run signal sent from the OptiView Control Center via the serial communications link software signal When either of these two signals are received by the main syst...

Страница 29: ...on the Logic Trigger Board and that there is a wire in stalled between J1 11 and J1 12 Verify that TB1 1 and TB1 2 are properly wired Verify the communication cable between the OptiView Control Cente...

Страница 30: ...JOHNSON CONTROLS 30 FORM 160 00 O2 ISSUE DATE 04 30 2019 THIS PAGE INTENTIONALLY LEFT BLANK...

Страница 31: ...no events are logged into the History Log To minimize the time it takes to cool down the SCRs and allow the chiller to restart sooner if the anti recy cle has timed out a condenser water pump control...

Страница 32: ...00 114 45 56 4274 2 37 2 02 115 46 11 4182 2 34 2 04 120 48 89 3757 2 22 2 15 130 54 44 3048 1 98 2 37 140 60 00 2487 1 75 2 57 150 65 56 2042 1 54 2 76 160 71 11 1687 1 35 2 93 170 76 67 1401 1 18 3...

Страница 33: ...t The LCSSS is now ready to start the chiller FILL COOLING LOOP The following procedure details the method of filling the cooling loop The Style B LCSSS is shipped with a 50 50 mix of Propylene Glycol...

Страница 34: ...in inch from the top of the coolant reservoir If the coolant level is low then add more YORK cool ant 4 Run the coolant pump for 10 minutes Verify that the level of the coolant is proper If the coolan...

Страница 35: ...e changed every year A coolant failure can result in a very expensive repair Do Not Reuse Coolant In the event that the coolant must be removed to fa cilitate a repair to the LCSSS All of the coolant...

Страница 36: ...R SHORTED SCR GATE 1 Remove main input power to the starter 2 Set ohm meter to Rx1 range If the ohm meter is a digital model and has a diode test scale place the meter in the diode test mode 3 Remove...

Страница 37: ...is the percentage phase imbalance for that phase Depending on the load of the motor a value of 1 5 can cause a cur rent imbalance of 15 If this is not the source of the problem continue Example Phase...

Страница 38: ...this is not the source of the problem continue 7 Measure resistance across J1 pin 1 2 A resistance value of 3 0 ohms should be displayed on your meter This resistor is a 0 1 tolerance compo nent If i...

Страница 39: ...ighten the hose clamps tubing must not contain any kinks 5 On 7L and 14L models it is necessary to clean the mating surfaces of the SCR assembly and in put bus bar with fine emery cloth or Scotchbrite...

Страница 40: ...com 5000 Renaissance Drive New Freedom Pennsylvania USA 17349 Subject to change without notice Printed in USA Copyright by Johnson Controls 2019 ALL RIGHTS RESERVED Form 160 00 O2 419 Issue Date Apri...

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