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A-B 80190-380-02-R控制器板
速度设置控件。如果外部速度微调的调整导致不稳定，请使用欧姆表检查电位计的异常行为（关闭电源）。必要时使用非润滑型电气清洁剂。如果内部转速电位计有故障，则更换控制装置。确保致动器从空载到满载移动大约2/3的行程。确保涡轮、柴油和燃油喷射原动机上的连杆是线性的。确保化油器原动机上的连杆是非线性的。有关正确安装，请参阅致动器手册。必要的外部电线未正确屏蔽。由于带有交流电压的电线、变压器的杂散磁场等引起的电气噪声可能会被屏蔽不当的电线拾取。如果噪声被与放大器求和点相关的线路拾取，如外部速度微调、并联线路、下垂触点、磁性拾取线路和同步器输入，则会导致不稳定。验证开关柜框架、调速器底盘和原动机是否具有公共接地连接。暂时从控制蓄电池系统上拆下蓄电池充电器电缆。如果通过上述修改，原动机的操作得到了显著改善，则应一次更换一根电线，以查找故障源。外部接线可能需要额外屏蔽或从高电流线路或部件重新布线。检查电源电压，低压控制装置上的电压应至少为20 Vdc，高压控制装置上应至少为90 Vdc或88 Vac。用跳线替换速度微调，用主速度电位计设置速度，以此进行检查。
原动机不与其他机组分担负载。
如果通过上述检查无法解决问题，则需要从开关设备上拆除2301A控制装置。临时将其安装在原动机旁边，仅将电池、磁性拾音器和致动器连接至控制器（使用放置在原动机旁的单独电池）。起动原动机后，在端子19和16之间放置一根小跳线，使原动机加速至额定速度。如有必要，施加荷载以检查稳定性。如果控制器安装在原动机旁边时出现稳定性，则将控制器返回开关设备。运行新的电磁拾波器、执行器和蓄电池电源线。将所有导线屏蔽至控制装置。将所有电线穿过导管或外屏蔽。将外护罩系到控制装置对面的系统接地端。检查执行器连杆与燃油控制机构之间的运动是否丢失、卡滞或负载过大。确认稳定的燃油压力值正确。根据适当的致动器手册检查致动器。如果致动器的电压为最大值（反向作用时为最小值），目视确定致动器轴是否处于最大位置。如果没有，则表明执行器有问题，或连杆或燃油系统受限。如果致动器有备用球头，则检查其液压调速器部分、速度设置和速降调整是否正确设置（参见适用的调速器手册）。
Speed setting controls.
If adjustment of external speed trim causes instability, check potentiometer with ohmmeter for erratic behavior (turn power off). Use non-lubricating electrical cleaner if necessary. If internal speed potentiometer is faulty, replace control.Make sure that actuator moves approximately 2/3 of its travel from no load to full load. Be sure linkage is linear on turbine, diesel, and fuel-injected prime movers. Be sure linkage is non-linear on carbureted prime movers. Refer to actuator manual for proper installation.Necessary external wires not properly shielded. Electrical noise, caused by wiring carrying an ac voltage, stray magnetic fields from transformers, etc., can be picked up by improperly shielded wire. Noise will cause instability if picked up by lines associated with the amplifier summing point such as external speed trim, paralleling lines, droop contact, magnetic pickup lines, and synchronizer input.Verify that the switchgear frame, governor chassis, and prime mover have a common ground connection. Temporarily remove the battery-charger cables from the control battery system. If the prime-mover operation is significantly improved by the above modifications, replace the wiring one at a time to locate the source of the trouble. External wiring may require additional shielding or rerouting from high-current lines or components.Check supply voltage, It should be at least 20 Vdc on low voltage controls and 90 Vdc or 88 Vac on high voltage controls.Check by replacing Speed Trim with jumper and setting speed with main speed potentiometer.
Prime mover does not share load with other units.
If the problem cannot be resolved by the above checks, it will be necessary to remove the 2301A control from the switchgear. Temporarily mount it next to the prime mover and connect only a battery, magnetic pickup, and actuator to the control (use a separate battery placed next to the prime mover). After starting the prime mover, place a small jumper wire across terminals 19 and 16 to cause the prime mover to accelerate to rated speed. If necessary, apply load to check stability. If stability occurs when the control is mounted next to the prime mover, return the control to the switchgear. Run new magnetic pickup, actuator, and battery power lines. Shield all wires to the control. Route all wires through conduit or an outer shield. Tie the outer shield to system ground at end opposite of the control.Check actuator linkage to fuel controlling mechanism for any lost motion, binding, or excessive loading. Verify a steady fuel pressure of proper value. Check actuator per appropriate actuator manual.If voltage to actuator is maximum (minimum for reverse-acting), visually determine if actuator shaft is at maximum position. If it is not, an actuator problem is indicated, or the linkage or fuel system is restricted.If actuator has a ballhead backup, verify that its hydraulic governor section, speed setting, and speed droop adjustments are properly set (see the applicable governor manual).
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