Facility-Cold Room TECHNICIAN (HVAC)

Thong Siek Food Industry Pte Ltd; Singapore; On-site; SGD 31,000 - 54,000; Full time

Job summary

Thong Siek Food Industry Pte Ltd in Singapore seeks an experienced HVAC/Refrigeration technician to manage walk-in cold rooms, blast freezers, chillers and ice room systems. You will diagnose and fix temperature issues, defrost failures, high/low pressure faults and controller alarms, ensuring continuous operation of industrial refrigeration processes.

The role requires strong hands-on skills, knowledge of defrost cycles, electrical troubleshooting and the ability to work weekends/public

Qualifications

• Minimum 3–5 years hands-on HVAC / Refrigeration experience.
• Cold room or industrial refrigeration experience is a MUST.
• Hardworking and independent, with ability to work overtime incl. weekends/public holidays.

Responsibilities

• Walk-in cold rooms / freezers maintenance and operation.
• Blast freezer systems with defrost-critical focus.
• Chiller systems / cooling tunnels and ice room processes.
• Secondary aircon systems handling including Mitsubishi basics.
• Defrost system troubleshooting and cycle control.

Skills

Refrigeration troubleshooting

Compressor diagnosis

Electrical & control troubleshooting

Controller handling

Defrost system understanding

Education

GCE 'O' Level

Tools

Multimeter

Leak detection tools

Job description

Job Scope (Primary Responsibility)

Main focus:

• Walk-in cold rooms / Freezers
• Blast freezer systems (defrost-critical)
• Chiller systems / cooling tunnels
• Ice room & process cooling

Secondary:

• Aircon systems (including Mitsubishi - basic to intermediate)

Critical Skills (MANDATORY)

1. Strong Refrigeration Troubleshooting (core requirement)

Candidate must be able to independently diagnose and fix:

• System not reaching temperature
• Intermittent cooling / unstable temperature
• Ice buildup / defrost failure
• High / Low pressure issues
• Refrigerant-related faults

Must be able to understand:

• Refrigeration cycle (practical, not theory only)
• Superheat / basic charging logic
• System behavior under load

Practical:

• Brazing & piping repair
• Leak detection tools
• Can work at height (no height phobia)

2. Compressor & System Fault Diagnosis

Hands-on experience with:

• Reciprocating compressors
• Multi-stage / low-temp systems

Must be able to troubleshoot:

• Compressor not starting
• Frequent tripping (HP/LP/overload)
• Abnormal noise / overheating
• Oil-related issues

3. Electrical & Control Troubleshooting (VERY IMPORTANT)

Must be able to:

• Read basic wiring diagrams
• Diagnose - Contractor/Relay faults, Power supply issues, Sensor faults
• Use multimeter confidently - Voltage, Continuity, Basic fault tracing

4. Controller Handling (e.g. Eliwell / Dixell)

Must be comfortable with controllers:

Required ability:

• Adjust setpoints
• Check alarms
• Identify fault conditions
• Trigger manual defrost - UP key ≥ 5 sec

Practical understanding:

• Controller affects - Compressor, Defrost, Fans

Required: Confident operations + troubleshooting logic

Not required: deep programming

5. Defrost System Understanding (IMPORTANT)

Must understand and troubleshoot:

• Hot gas defrost
• Electric heater defrost

Example system: Timed defrost cycles (e.g. every 4hrs, ~ 23mins)

Must be able to identify:

• Heater failure
• Valve not switching
• Defrost not terminating

Job Requirement:

• Minimum 3-5 years hands-on HVAC / Refrigeration
• Minimum GCE 'O' Level
• Cold room or industrial refrigeration experience is a MUST
• Hardworking & Independent
• A team player
• Must be able to work on Weekends/Public Holidays

*Please DO NOT apply for this role if you only have residential aircon technician experience