ASCO Repair Services India
ASCO, a Emerson Electric company, is a global leader in power transfer switches, load bank controllers, and industrial distribution equipment. With over 130 years of heritage, ASCO serves critical infrastructure, data centres, hospitals, and manufacturing across India and worldwide. Their robust automatic transfer switches (ATS) and static transfer switches (STS) are backbone systems in Indian power-dependent industries.
ASCO, a Emerson Electric company, is a global leader in power transfer switches, load bank controllers, and industrial distribution equipment. With over 130 years of heritage, ASCO serves critical infrastructure, data centres, hospitals, and manufacturing across India and worldwide. Their robust automatic transfer switches (ATS) and static transfer switches (STS) are backbone systems in Indian power-dependent industries.
Synchronics Electronics has deep expertise in ASCO automatic transfer switches, static transfer switches, load banks, and controller electronics. We diagnose and repair ASCO ATS/STS failures, solenoid valve malfunctions, control board faults, and display panel issues across India. Our 180+ engineers understand ASCO's mechanical-electrical integration and deliver same-day diagnostics and fast turnaround repairs that keep your critical power systems online.
Synchronics restores ASCO ATS and STS systems to operational reliability across India.
ASCO Product Lines We Repair
Our engineers are trained on the full ASCO product range. Below are the major product families we service.
Automatic Transfer Switches (ATS)
ASCO ATS units manage seamless switchover between utility and backup power in hospitals, data centres, and manufacturing. Common repairs include solenoid coil failures, mechanical latch jamming, contact erosion, and control logic board faults that prevent automatic transfer.
Static Transfer Switches (STS)
ASCO STS units provide zero-transfer-time switching for IT infrastructure and mission-critical loads. Repair focus includes thyristor modules, gate drive circuits, voltage sensing card failures, and timing synchronisation issues that cause output anomalies.
Load Bank Controllers
ASCO load bank control modules manage load testing and simulate facility demand. Failures include contactor dropout, analog signal conditioning errors, temperature sensor open circuits, and firmware corruption affecting load ramp profiles.
Remote Transfer Switch Units
ASCO remote switching modules extend ATS capability to distributed generator and fuel cell installations. Common faults are communication card failures, relay contact pitting, solenoid valve seal degradation, and loss of feedback signals.
Control and Display Panels
ASCO operator interface panels display ATS/STS status, fault codes, and manual override options. Repairs address LCD/LED backlight failure, tactile button wear, PCB corrosion from humidity and salt spray, and serial communication faults.
Generator Interface Modules
ASCO GIM cards synchronise generator output voltage and frequency before ATS transfer. Failure modes include phase-loss detection malfunction, voltage regulation drift, synchronisation timeout, and control relay chattering.
Why Choose Synchronics for ASCO Repairs?
PCB-Level Expertise
We repair down to the component level — not just swap boards. Our engineers identify root causes, replace failed IGBTs, capacitors, processors, and gate drivers on ASCO equipment.
Fast Turnaround
Standard 7–10 working days. Express 3–5 days available for critical breakdowns. Emergency same-day/next-day service for unplanned downtime.
6-Month Warranty
Every repaired unit ships with a 6-month comprehensive warranty on parts and labour. Our repair success rate is over 94% across all brands.
All-India Service
Couriered repairs accepted from any city in India. Doorstep pickup available in Vadodara, Mumbai, Pune, Ahmedabad, Surat, Chennai, and more.
Common ASCO Equipment Faults We Fix
Based on 30+ years of repair data, these are the most frequent failure modes we see in ASCO equipment arriving at our workshop.
- ✓Automatic transfer switch fails to transfer power — ASCO ATS solenoid coil loses continuity due to winding insulation breakdown or connector corrosion. Control logic board failure prevents solenoid energisation. Mechanical latch seizure from dust ingress or lubricant degradation blocks physical transfer.
- ✓Static transfer switch exhibits zero-crossing distortion — ASCO STS thyristor gate drive timing skew causes asymmetric turn-on across the three phases. Voltage-sensing transformer saturation or capacitive coupling interference introduces phase angle error. Gate pulse oscillator drift destabilises switching transition.
- ✓Load bank controller ramps load erratically or stops mid-test — ASCO contactor coil or mechanical latch wears, causing dropout during load step sequence. Temperature sensor thermistor drifts out of calibration range. PWM duty-cycle control IC loses frequency lock due to capacitor ageing.
- ✓Remote transfer switch loses communication with master ATS — ASCO serial communication card develops dry-joint solder failures or electrolytic capacitor leakage on signal conditioning stage. Twisted-pair cable shielding degradation introduces noise. Firmware corruption from power surge or incomplete update halts communication handler.
- ✓Control panel display shows no output or partial character segments — ASCO LCD/LED backlight inverter IC failure or fluorescent tube end-of-life darkening. Segment driver IC output stuck low due to internal short or failed logic output pin. Contrast potentiometer corroded by humidity ingress.
- ✓Generator synchronisation fails - mains and gen voltage mismatch — ASCO GIM card voltage-sensing transformer winding develops inter-turn short, skewing voltage ratio measurement. Phase-loss detection comparator threshold drifts due to reference IC ageing. Voltage divider resistors drift out of tolerance from thermal stress.
How We Repair Your ASCO Unit
Receive & Log
Your unit is logged into our tracking system with a unique job number. You receive WhatsApp / email updates at every stage.
Fault Diagnosis
Board-level diagnosis using oscilloscopes, LCR meters, and thermal cameras. Root cause identified before any repair begins.
Component Repair
Faulty ICs, capacitors, MOSFETs, IGBTs, and gate drivers replaced with genuine or equivalent-spec components.
Full-Load Test
Unit tested under rated load with original or equivalent motor. All parameters verified. 6-month warranty issued.
Industries Using ASCO Equipment
We serve plant maintenance teams across all major industries where ASCO automation is deployed.
Frequently Asked Questions — ASCO Repairs
Do you repair ASCO equipment anywhere in India?+
Yes. Synchronics repairs the full ASCO product range - automatic transfer switches, static transfer switches, load bank controllers, and all ASCO industrial distribution electronics. We offer PAN India door-to-door pickup service from Mumbai, Delhi, Pune, Chennai, Hyderabad, Ahmedabad, Bangalore, Kolkata, and all other metros and industrial cities. Repairs are performed at our facility in Vadodara, Gujarat, with same-day diagnostics and express turnaround on critical power equipment.
What is the typical repair turnaround for an ASCO ATS that won't transfer?+
ASCO automatic transfer switch diagnostics take 4-6 hours on bench. Solenoid coil replacement takes 2-4 hours; mechanical latch service takes 3-5 hours. Control board repair or exchange adds 1-2 hours. Most ATS units are test-ready within 24-48 hours. Express same-day repair is available for critical data centre and hospital systems if diagnostics are completed by 2 PM.
Can you repair ASCO static transfer switches used in server rooms?+
Yes. Synchronics specialises in ASCO STS repair for data centres. We have three-phase load banks and digital scopes to verify zero-crossing switching symmetry, gate drive timing, and thyristor forward-drop stability under dynamic load. We replace thyristor modules, gate drive ICs, and voltage feedback circuits. All STS units are tested to 110 percent rated load before shipment back to your facility.
What fault codes does ASCO display on HMI panels and what do they mean?+
Common ASCO ATS fault codes include: E01 - Solenoid coil open (no transfer possible); E02 - Voltage out of range (utility or generator); E03 - Frequency out of sync; E04 - Mechanical latch failure (visual inspection needed); E05 - Loss of neutral/ground. Synchronics diagnostic report translates ASCO fault codes, identifies root cause (solenoid, voltage sensing card, synchronisation module), and specifies exact replacement components needed. We keep ASCO spare parts in stock for 48-hour turnaround.
Do you offer ASCO equipment calibration and preventive maintenance?+
Yes. Synchronics offers ASCO preventive maintenance contracts for hospitals, data centres, and pharmaceutical plants. We clean and inspect ATS solenoids and mechanical latches, test voltage and frequency sensing circuits with precision meters, replace worn contactors, and recalibrate load bank controllers to ASCO specification. Annual PLC testing and firmware validation ensure your ASCO systems remain reliable. We also provide on-site training to your maintenance team on ASCO fault diagnostics and safe manual bypass procedures.
How do I send my ASCO unit for repair?+
Pack the unit securely and courier it to our Vadodara workshop. Include a note with the fault description and your contact details. We will log it into our system and WhatsApp you a job number within 24 hours of receipt. Doorstep pickup is available in Vadodara, Ahmedabad, Surat, Mumbai, and Pune.
What is the cost of repairing a ASCO drive or PLC?+
Repair cost depends on the model and the fault. We offer a free diagnosis — once we identify the fault, we provide a fixed quotation before proceeding. Typical repairs cost 20–40% of the new unit price. We will never repair without your approval.
What warranty do you provide on ASCO repairs?+
All repaired units carry a 6-month comprehensive warranty covering the same fault and related issues. If the fault recurs within the warranty period, we repair it free of cost.
Do you provide a no-fix, no-fee guarantee?+
Yes. If we cannot repair your ASCO unit after diagnosis, you pay only the diagnosis fee (₹500–₹1,500 depending on the product). The unit is returned to you at no additional charge.
ASCO Repair Catalog
No products found for ASCO
Don't See Your ASCO Model Listed?
We repair the full range of ASCO industrial electronics — even if the specific model is not yet in our catalog. Send us the unit details and we'll confirm repairability within 24 hours.
Free evaluation • 6-month warranty • PAN India pickup
Get Your Equipment
Back in Action — Fast
Send us your faulty industrial electronics. Our engineers will diagnose it and provide a detailed quote within 24 hours — with no obligation to proceed.
Free Evaluation
No obligation
48hr Turnaround
Fastest in India
6-Month Warranty
Every repair
No Fix, No Charge
Zero risk policy
Pan-India Pickup
Doorstep service