DOLD Repair Services India
DOLD is a German manufacturer of safety relays, monitoring devices, and industrial control electronics founded in 1954. Specializing in process safety and automation, DOLD equipment is critical in Indian manufacturing plants across chemicals, pharmaceuticals, food processing, and heavy engineering. Their modular relay systems and safety controllers are trusted by process industries across India for fail-safe operations and compliance with industrial safety standards.
DOLD is a German manufacturer of safety relays, monitoring devices, and industrial control electronics founded in 1954. Specializing in process safety and automation, DOLD equipment is critical in Indian manufacturing plants across chemicals, pharmaceuticals, food processing, and heavy engineering. Their modular relay systems and safety controllers are trusted by process industries across India for fail-safe operations and compliance with industrial safety standards.
Synchronics repairs the complete DOLD safety relay and automation control range including their relay modules, safety monitors, emergency stop relays, and logic control systems. Our 180+ engineers have extensive experience troubleshooting DOLD equipment failures in Indian plants — from relay coil burnout to contact welding and monitoring circuit faults. We provide rapid diagnosis, genuine component replacement, and full functional testing to restore DOLD systems to original safety-critical performance.
DOLD safety relay and monitoring device repair specialists across India since 1994.
DOLD Product Lines We Repair
Our engineers are trained on the full DOLD product range. Below are the major product families we service.
DOLD Safety Relays (SR Series)
Modular safety relays for emergency stop circuits, two-hand control, and safety interlock monitoring. Common faults include contact wear, coil failures, and relay chatter under electrical noise. These are critical components in machinery guarding circuits across Indian manufacturing floors.
DOLD Monitoring Relays (MR Series)
Phase monitoring, voltage monitoring, and current-sensitive relays for motor protection and supply failure detection. Indian plants use these extensively for three-phase motor protection in pumps, compressors, and conveyors. Common issues: threshold drift, contact stiction, and failure to respond to supply loss events.
DOLD Safety Monitoring Modules (SMS Series)
Advanced safety control modules for process validation, pressure monitoring, and temperature-limit relay functions. Used in pharmaceutical batch processes, chemical reactors, and food sterilization equipment. Failures often involve sensor input isolation, output relay sticking, and logic board faults.
DOLD Emergency Stop Relays (ESR Series)
Hardwired emergency stop circuit relays with dual-channel monitoring for machinery safety. Common in Indian textile mills, printing presses, and injection molding plants. Typical faults: contact erosion, dual-channel cross-wiring issues, and coil insulation breakdown.
DOLD Logic Control Modules (LCM Series)
Compact logic controllers combining relay switching with safety monitoring for process automation. Used in Indian FMCG production lines, pharmaceutical filling lines, and automotive assembly. Failure modes: output relay failures, input circuit board damage, and firmware/logic loss.
DOLD Dual-Channel Safety Controllers (DCS Series)
Redundant-channel safety controllers for critical process shutdowns and fault-tolerant automation. Essential in chemical plants, oil refining, and power generation in India. Common issues: channel synchronization loss, sensor mismatch, and voting logic circuit failures.
Why Choose Synchronics for DOLD 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 DOLD 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 DOLD Equipment Faults We Fix
Based on 30+ years of repair data, these are the most frequent failure modes we see in DOLD equipment arriving at our workshop.
- ✓Relay coil burnout or open winding — DOLD relay coils experience insulation breakdown due to thermal aging, moisture ingress in humid Indian factory environments, or sustained overvoltage spikes from unfiltered three-phase supply. Burnout prevents the relay from energizing, causing complete loss of control function.
- ✓Contact welding or stiction in safety relay — DOLD safety relay contacts weld under high inrush current loads or arc erosion from repeated switching of inductive machinery circuits. Contact stiction prevents the relay from opening, causing the controlled device to remain active even when the safety input is triggered.
- ✓Monitoring relay threshold drift (voltage or current out of spec) — DOLD monitoring relays (MR series) experience potentiometer drift due to vibration, thermal cycling, or component aging. This causes the relay to trip at incorrect voltage or current thresholds, leading to nuisance shutdowns or failure to protect motor circuits in Indian plants.
- ✓Dual-channel synchronization loss in safety controllers — DOLD DCS safety controller channels lose synchronization due to input sensor timing mismatch, cross-wiring errors during installation, or communication line noise. This triggers false safety shutdowns and prevents process operation.
- ✓Input circuit board traces burned or corroded — Moisture, salt spray (common near Indian coastal manufacturing areas), and electrical transients damage DOLD PCB input stages. Burned traces break signal continuity, while corrosion increases input impedance, causing intermittent or false triggering of safety functions.
- ✓Output relay fails to close or opens prematurely — DOLD output relay springs weaken due to mechanical fatigue or corrosion, causing slow closure or premature opening. This disrupts process control timing in automation sequences and prevents emergency stops from functioning reliably.
How We Repair Your DOLD 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 DOLD Equipment
We serve plant maintenance teams across all major industries where DOLD automation is deployed.
Frequently Asked Questions — DOLD Repairs
Do you repair DOLD equipment anywhere in India?+
Yes. Synchronics repairs the complete DOLD product range including safety relays, monitoring modules, emergency stop controllers, and dual-channel safety systems. We offer PAN India door pickup and delivery from Mumbai, Delhi, Pune, Chennai, Hyderabad, Ahmedabad, Surat, and all major cities. All repairs are performed in our Vadodara, Gujarat facility with DOLD certification and functional testing.
What is the turnaround time for DOLD safety relay repair in India?+
Standard DOLD relay repairs typically take 5-7 working days including diagnostics, component procurement, repair, and safety testing. Critical safety equipment can be prioritized for 2-3 day turnaround. If spare modules are in stock, we can often ship a replacement module immediately and repair the faulty unit later. Contact our Vadodara office for emergency same-day assessment.
Are DOLD replacement parts available in India, or do you use non-genuine components?+
Synchronics uses only genuine DOLD components and approved equivalents for all repairs. We source relay coils, contact blocks, spring assemblies, and PCB modules directly from DOLD's authorized Indian distributors and European supply partners. All replaced components carry DOLD traceability. We never use non-certified parts for safety-critical DOLD equipment.
How do I know my DOLD safety relay is failing? What are the warning signs?+
Watch for: relay chattering (audible noise during switching), slow response time to emergency stop input, nuisance shutdowns with no apparent cause, inability to hold a safety state (contact stiction), visible burn marks or corrosion on relay contacts, and loss of mechanical click when energizing. Indian plants operating DOLD equipment in high-humidity, vibration-prone, or harsh electrical environments should schedule preventive diagnostics every 18-24 months.
Can Synchronics help with DOLD equipment compliance and safety documentation for Indian audits?+
Yes. Synchronics provides complete repair documentation, functional test certificates, IEC 60950 compliance verification, and threshold calibration reports for all DOLD safety relay and monitoring device repairs. We can support your safety audits, prepare spare-parts procurement lists, and recommend preventive maintenance schedules for DOLD systems in Indian plants. Contact our technical support team to discuss your facility's needs.
How do I send my DOLD 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 DOLD 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 DOLD 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 DOLD 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.
DOLD Repair Catalog
No products found for DOLD
Don't See Your DOLD Model Listed?
We repair the full range of DOLD 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
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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