Bosch Searchable Fault & Error Code Guide
| Code | Condition / Symptom | Engineering Diagnosis & Fix |
|---|---|---|
| E09 | Heating element / compressor inverter temperature circuit trip | Measure heater resistance, verify NTC sensor readings. |
| E15 | Internal base pan leak sensor safety float activated | Locate internal water seepage, clear drain passage, reset safety float. |
| E18 | Water drainage pump flow restriction or impeller lock | Clean pump impeller filter chamber, check drain pump motor winding. |
| E24 | Water drain flow timeout or blockage | Inspect drain hose for kink, verify non-return check valve. |
| F02 | Water temperature thermistor circuit malfunction | Measure NTC probe resistance, check controller wiring harness. |
| F11 | Motor speed feedback communication error | Inspect EcoSilence motor cable harness, test Hall sensor pulses. |
Genuine Bosch Replacement Spares & Rate Card
| Component / Spare Part | Transparent Pricing (₹) | Warranty Term | Status |
|---|---|---|---|
| ⚙️ Bosch EcoSilence Drive Inverter Motor | ₹3,400 - ₹6,800 | 2 Years Warranty | ✓ Available on Standby Van |
| ⚙️ Bosch Electronic Heat Pump Control Board | ₹4,200 - ₹7,900 | 1 Year OEM Warranty | ✓ Available on Standby Van |
| ⚙️ Bosch Electronic Dual Flow Sensor | ₹1,200 - ₹2,100 | 1 Year Warranty | ✓ Available on Standby Van |
| ⚙️ Bosch Heavy-Duty Condensate Lift Pump | ₹1,650 - ₹2,950 | 1 Year Warranty | ✓ Available on Standby Van |
Common Bosch Breakdown Symptoms
- EcoSilence BLDC motor controller sensor feedback error (Code E09/E15)
- Inverter drive heat exchanger flow temperature difference exceedance
- Drainage condensate pump safety float switch lockout
- High pressure refrigerant safety switch trip
Engineering Maintenance Protocol
- Digital CAN-bus telemetry diagnostics via Bosch Service Tool
- EcoSilence motor rotor magnet inspection and winding insulation megger testing
- Descaling plate heat exchangers on Bosch heat pump hydronic loops
- Testing differential pressure sensor hysteresis
📖 Bosch Field Engineering Guide & Technical Documentation
📋 Table of Contents
Certified Bosch AC Service in Pune: Factory-Trained Climate Engineering
Need specialized Bosch AC service in Pune? Prime Cool delivers certified diagnostic and maintenance solutions for all residential split, commercial cassette, and VRF systems engineered by Bosch. With proprietary microcomputer inverter circuits, twin-rotary compressors, and electronic expansion valves, Bosch cooling equipment demands factory-calibrated testing rather than guesswork. Our Pune engineers utilize specialized diagnostic equipment to analyze optical communications, thermistor resistance curves, and IPM module integrity to resolve breakdowns in under 45 minutes.
6-Step SOP for Bosch AC Service
Every certified call for Bosch follows our comprehensive procedure:
- Digital Microcomputer Telemetry: Interfacing with diagnostic ports to pull operating frequency and fault history.
- Three-Phase Inverter IPM Analysis: Testing DC bus voltage (approx. 310V DC) and IPM switching across compressor UVW terminals.
- Chemical Fin Foam Jet Wash: High-pressure alkaline wash dissolving dust without corroding factory fin protective coatings.
- Electronic Expansion Valve (EEV) Stepper Calibration: Verifying stepper motor coil phase resistance and testing pulse positioning.
- Refrigerant Pressure & Superheat Audit: Connecting digital manifolds to calibrate standing, suction, and discharge pressures.
- Commissioning with 90-Day Guarantee: Handover testing under full load with written 90-day parts and labour warranty certificate.
Common Bosch Fault Codes & Field Diagnostics
Our engineers rapidly diagnose Bosch error codes directly on-site:
- Communication Bus Errors: Serial transmission loss between indoor and outdoor microcontrollers, typically resolved through optical isolator repair.
- Compressor Overcurrent / IPM Trips: High load or heat sink thermal paste breakdown causing inverter drive protection trips.
- Sensor Open / Short Circuits: Thermistor resistance drift on evaporator coil and compressor discharge copper pipes.
- Outdoor Fan Motor Overload: BLDC motor Hall effect sensor feedback failure or bearing seizure.
100% Genuine Bosch OEM Spare Parts Price Schedule
| Bosch Spare Part | Application | Price Range | Warranty Protection |
|---|---|---|---|
| Main Outdoor Inverter PCB | Inverter Split Range | ₹2,800 – ₹5,500 | 1-Year OEM Warranty |
| Rotary Compressor Assembly | 1.0T, 1.5T, 2.0T Units | ₹6,500 – ₹11,500 | 5-Year Warranty |
| Indoor Cross-Flow Blower & Motor | All Wall-Mounted Units | ₹1,850 – ₹3,200 | 90-Day Written Warranty |
| Electronic Expansion Valve (EEV) | Inverter & VRV Series | ₹1,650 – ₹2,800 | 90-Day Written Warranty |
Technical Standards (ISHRAE & BEE India)
All servicing diagnostics, electronic soldering protocols, and refrigerant handling for Bosch systems strictly adhere to engineering standards established by the Indian Society of Heating, Refrigerating and Air Conditioning Engineers (ISHRAE). Energy preservation guidelines align with norms set by the Bureau of Energy Efficiency (BEE India).
Frequently Asked Questions on Bosch AC Service
Do you repair Bosch Inverter AC PCBs on-site?
Yes, our mobile vans carry advanced electronic oscilloscopes, IPM module replacements, and testing rigs to resolve over 85% of Bosch PCB faults directly on-site in Pune.
How fast can a technician arrive for Bosch AC repair?
Our emergency vans maintain active standby across Pune, reaching your doorstep within 30 to 45 minutes of booking confirmation.
Are genuine OEM spare parts used?
Yes, we install 100% factory-original replacement components with an official 90-day parts and labour warranty.
Bosch Authorized Service Centers Across 82+ Pune Hubs
Select your locality below to access direct emergency dispatch, local arrival SLAs, and genuine Bosch replacement parts.