Recirculating chillers · Kodiak family

Lytron RC006: troubleshooting and error codes

The ServiceForge knowledge base holds 16 documented symptoms for the Lytron RC006, with 49 ranked causes, 20 diagnostic checks with test points and expected values, and 6 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Low coolant flow

Reduced coolant flow rate or flow alarm triggered

Ranked causes

1. Pump suction strainer clogged (positive displacement pumps) (common)
2. Low coolant level or empty reservoir (common)
3. Water filter dirty or clogged (common)
4. Pressure relief set too low (positive displacement and turbine pumps) (occasional)
5. Restriction in external coolant lines (occasional)
6. Pump overload has tripped (occasional)
7. Leaks in external piping (occasional)
8. Pump motor shaft bound or damaged (rare)
9. Damaged pump (rare)
10. Shutoff feature enabled in controller (occasional)
11. Low flow switch tripped (occasional)

First check

Check reservoir coolant level

Test point: Reservoir fill mark
Expected: Coolant at full mark

2 more checks with pass and fail actions, 11 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Audible alarm stays on

Continuous audible alarm from chiller (Control Package II and III only)

Ranked causes

1. Low coolant level in reservoir (common)
2. Level switch stuck (occasional)
3. Level switch damaged (occasional)
4. Low temperature alarm setpoint too close to cooling setpoint (occasional)
5. High temperature alarm setpoint too close to cooling setpoint (occasional)

First check

Check reservoir coolant level

Test point: Reservoir sight glass or fill mark
Expected: Coolant level at full mark

1 more check with pass and fail actions, 5 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Unit does not power on caution

Circuit breaker off or tripped; no power to unit keypad or display

Ranked causes

1. Unit not plugged in or power disconnected (common)
2. Circuit breaker in OFF position (common)
3. Low voltage to unit (occasional)
4. Fault shutoff enabled in controller (occasional)
5. Pump not primed (occasional)

First check

Verify power cord connected

Test point: Power outlet and unit plug
Expected: Power outlet has 120V/240V AC as rated

2 more checks with pass and fail actions, 5 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Chiller shuts down during operation

System stops unexpectedly after running normally

Ranked causes

1. Low flow switch tripped (common)
2. Auto temperature alarm tripped - process fluid overtemp (common)
3. Temperature setpoint not set properly (occasional)
4. Shutoff feature enabled in controller for low coolant flow (occasional)

4 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Cooling insufficient or unit does not cool

System runs but does not cool adequately or cooling load not reduced

Ranked causes

1. Cooling load exceeds unit capacity (common)
2. Controller setpoint too high (common)
3. Condenser coil fouled with dust or debris (occasional)
4. High-pressure cutout tripped (RC030/RC045 water-cooled only) (occasional)

First check

Verify controller setpoint temperature

Test point: Controller display or menu
Expected: Setpoint matches application requirement

1 more check with pass and fail actions, 4 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Noisy compressor during operation

Compressor produces excessive or abnormal noise while running

Ranked causes

1. Liquid refrigerant collected in compressor (long cool storage) (occasional)
2. Pump shaft seal damage (rare)
3. Excessive pressure drop in system (occasional)

3 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Pump motor overheats caution

Pump motor temperature elevated or motor shuts down from thermal overload

Ranked causes

1. Obstruction in pump head (common)
2. Low level in reservoir (common)
3. Improper voltage to system (occasional)

First check

Check coolant level in reservoir

Test point: Reservoir sight glass or fill mark
Expected: Coolant level at full mark

1 more check with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Excessive pressure in facility water (water-cooled units only) caution

Water inlet pressure exceeds normal limits on water-cooled models

Ranked causes

1. High-pressure cutout tripped (RC030/RC045 water-cooled only) (common)
2. Low voltage or wrong voltage to unit (occasional)

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Noisy pump motor

Pump motor produces excessive noise or grinding sounds

Ranked causes

1. Positive displacement pump worn out (occasional)
2. Improper voltage to system (occasional)

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Pump fails to prime caution

Pump does not displace air in housing, preventing fluid from being drawn in; centrifugal and turbine pumps are non-self priming

Ranked causes

1. Trapped air in pump housing and suction line (common)
2. Pump not primed before operation (common)

First check

Verify priming valve is in open position (if equipped)

Test point: Pump priming valve located between pump discharge and tank top
Expected: Valve in open position

1 more check with pass and fail actions, 6 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Recirculating pressure too high caution

System pressure exceeds normal operating range

Ranked causes

1. Pressure drop through system too large (common)
2. Pump internal pressure relief set too high (occasional)

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Unit starts then shuts off shortly after caution

Unit begins operation but stops within seconds or minutes of startup

Ranked causes

1. Compressor internal overload tripped (common)
2. Low flow shutoff activated (common)

First check

Wait for compressor overload reset

Test point: Unit restart attempt
Expected: Unit does not shut off within 5 minutes of restart

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: temperature offset adjustment

Adjust calibration offset for temperature reading accuracy on RC006 chiller display

Ranked causes

1. Temperature display requires calibration offset (common)

First check

Enter customer menu

Test point: Control panel buttons
Expected: Display shows CAL option after scrolling

2 more checks with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Excessive noise on startup

Unit produces loud noise during initial startup phase

Ranked causes

1. Liquid refrigerant in compressor suction line (common)

First check

Listen for noise reduction

Test point: System operation duration
Expected: Noise diminishes within 5 minutes of running

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Temperature display dim at startup

LCD display appears dim or faint during initial power-on

Ranked causes

1. Normal startup behavior - display backlight ramping (common)

First check

Monitor display brightness after power-on

Test point: LCD display
Expected: Display brightens to normal level within 5-10 seconds

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Temperature display reads incorrectly

Digital display shows wrong or fluctuating temperature value

Ranked causes

1. Temperature offset incorrectly set (common)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Error codes

Code	Meaning	Trigger	Severity
`Err 01`	Controller initialization error	Error in controller software initialization during power up	error
`Err 02`	RTD error	RTD resistance outside expected range; disconnect, damage, cut wire, short, or internal malfunction	error
`Err 03`	Controller operational error	Error in controller software while the chiller is running	error
`Err 04`	Low flow error	Low flow condition exists in the system	critical
`Err 05`	Remote start	Chiller has been turned off from the front panel while the remote start feature is enabled within the user menu	warning
`Err 07`	Auto temperature shutdown	Process fluid temperature is above the highest allowable temperature	critical

Likely causes and actions for each code are in ServiceForge. Connect ServiceForge to your AI

Community

0 fixes logged by technicians through their AI, with outcomes, for this model.

ServiceForge knowledge base record. Field-unverified unless technicians confirmed it. A teaching summary of the record, not a service manual. Export 2026-10-14.