When the ignition is switched ON, the pump’s 3-digit LED display will show a rotating clock pattern. This indicates the system is successfully connecting to the control unit.

After about 10 seconds, the display will change to show the selected greasing duty mode, and the green LED will turn on to confirm the pump is ready to operate.

This display indicates the system is in light duty mode. It’s designed for machines that require less frequent greasing. The system applies longer intervals between greasing cycles and delivers a reduced amount of grease.

Use this mode for equipment operating in cleaner environments or with lower grease consumption.

This mode indicates the system is in medium duty mode, which is the standard operating setting. It applies regular intervals between greasing cycles and delivers a balanced amount of grease.

Ideal for general machinery usage under normal working conditions.

This mode indicates the system is in heavy duty mode, designed for machines that operate in harsh conditions or have high grease consumption.

The system applies shorter intervals between greasing cycles and delivers a larger amount of grease to protect critical components.

*Pump performs a single cycle test (LED flashes slow). (See paragraph 3.2 Twin 3 Manual).

Pump performs multiple cycle test (LED flashes fast). (See paragraph 3.3 Twin 3 General Manual).

To stop this function, turn off power to reset.

The system has detected a low grease level in the reservoir. This warning signals that the reservoir needs to be refilled soon to avoid interruption in automatic greasing cycles.

If greasing continues without refilling, it may trigger E15 – Empty Reservoir, which disables the pump.

The system has detected an unresolved error condition that prevents the user from selecting a greasing duty cycle.

You must resolve the active fault code (e.g. E11–E15) before the system will allow changes to greasing mode.

Refer to Twin-3 display error codes in the manual for instructions on clearing the fault and restoring full functionality.

Cause

• Pressure switch did not close during a greasing cycle in primary Line A
• Possibly due to:
  • Broken or damaged Line A
  • Internal bypass in metering unit
  • Air trapped in pump or primary Line A

Solution

• Inspect Line A and connectors; replace or repair as needed
• Use Uni-GINA or PC-GINA to check timer activation settings
• Refill reservoir fully until air is purged (see section 4.5.2)
• Bleed pump and lines (see sections 4.3 & 4.4)
  
  

Cause

The pressure switch did not close during a greasing cycle in primary line-B. Possibly caused by:

• Broken or damaged primary Line B
• Metering unit causes internal bypass
• Air trapped in pump and/or primary line-B

Solution

• Check condition of primary lines and connectors. Replace or repair when necessary.
• Refer to “Procedure when internal system leak is suspected” (Twin 3 Manual, page 43).
• Refill the reservoir until it is bled. See section 4.5.2 “Filling the reservoir”.
• Bleed the pump and primary lines. See sections 4.3 and 4.4 “Bleeding pump & system”.

Cause

The pressure switch in primary line-A was still closed at the beginning of the cycle.

This may be due to:

• Wiring harness or connector issue
• 5/2-way valve not switching properly
• Faulty pressure switch

Solution

• Check wiring harness and connector points – repair or replace if damaged.
• Test the valve manually using Uni-GINA or PC-GINA; replace if not operating correctly.
• Inspect and replace the pressure switch if necessary.

Cause

The pressure switch in primary line-B was still closed at the outset of the cycle.

This may be caused by:

• Wiring harness interrupted at joining point
• 5/2-way valve not operating properly
• Faulty or broken pressure switch

Solution

• Check all wiring and connectors; replace or repair as needed.
• Use Uni-GINA or PC-GINA to manually test the valve. Replace if malfunctioning.
• Inspect and replace the pressure switch (valve) if necessary.

Cause

Greasing cycles could not be completed because the grease reservoir was empty. This disabled the pump.

May be caused by:

• Maximum number of cycles exceeded with low-level switch activated
• A combination of low-level switch activation and a prior pressure error (Line A or B)

Solution

• Refill the reservoir. Follow Twin 3 Manual section 4.5.2 “Filling the reservoir”.
• After refilling, bleed the system. See section 4.3 “Bleeding the pump”.

Cause

The supply voltage dropped below the required operating level during one or more greasing cycles.

• Weak battery or poor electrical connections
• Undersized power supply cable or excessive voltage drop

Solution

• Check battery voltage and charging system
• Inspect power cables for damage, corrosion, or poor connections
• Use appropriate cable thickness to prevent voltage loss

Cause

The system has detected a fault in the pressure switch circuit.

• Wiring to the pressure switch may be loose or damaged
• Pressure switch itself may be faulty
• Other electrical interference or wear over time

Solution

• Inspect the pressure switch wiring and connectors for any faults or signs of damage
• Test the pressure switch and replace if necessary
• Check continuity and electrical function with diagnostic tools (e.g., Uni-GINA or PC-GINA)

Cause

Control unit detected a too high cur- rent draw to pump motor and aborted the attempted cycle, caused by:

a) Short circuit in wiring of motor.

b) Short circuit in motor.

c) Drive shaft blocked.

d) Extreme low working temperature in combination with a grease not suitable for these conditions.

e) The "pump motor current limit" setting not suitable for the extreme low working temperature.

Solution

a) Check the wiring of motor. Replace or repair when necessary.

b) Check motor on wiring faulty, check the resistance of the motor. Replace when necessary.

c) Check the drive shaft on blocking. Replace or repair when necessary.

d) Replace the grease in the reservoir and bleed the system with a suitable grease for the obtained working conditions.

e) Increase the "pump motor current limit" parameter setting but only after checking whether the vehicle wiring and fuse can handle a higher setting.

Cause

The system has detected an open circuit on the pump output.

• Loose or disconnected wiring to the pump
• Connector pins not seated correctly or damaged
• Internal fault within the pump unit or wiring harness

Solution

• Inspect the pump power connections and wiring harness for damage or disconnection
• Ensure all connectors are firmly seated and free from corrosion
• Test the pump circuit using a diagnostic tool (e.g., Uni-GINA or PC-GINA)

Cause

Control unit detected a too low current draw to first coil of the 5/2-way valve in combination with initial “system on pressure before cycle” error, caused by:

a) Interrupted wiring of the coil.

b) Defective coil.

Solution

a) Check wiring. Replace or repair when necessary.

b) Check coil on wiring faulty, check the resistance of the coil. Replace or repair when necessary.   

Cause

Control unit detected a too high cur- rent draw to 5/2-way valve in combi- nation with initial “system on pressure before cycle” error, caused by:

a) Short circuit in wiring of the coil.

b) Defective coil

Solution

a) Check wiring. Replace or repair when necessary.

b) Check coil on wiring faulty, check the resistance of the coil. Replace or repair when necessary.

Cause

Control unit detected a too high cur- rent draw to 5/2-way valve in combi- nation with initial “system on pressure before cycle” error, caused by:

a) Short circuit in wiring of the coil.

b) Defective coil

Solution

a) Check wiring. Replace or repair when necessary.

b) Check coil on wiring faulty, check the resistance of the coil. Replace or repair when necessary.

Cause

Control unit detected a too high cur- rent draw to 5/2-way valve in combination with initial “system on pressure before cycle” error, caused by:

a) Short circuit in wiring of the coil.

b) Defective coil. 

Solution

a) Check wiring. Replace or repair when necessary.

b) Check coil on wiring faulty, check resistance of the coil. Replace or repair when necessary.

Cause

a) No communication between display & control unit.

b) No supply voltage at the pump.

c) Defective Twin-3 display.

Solution

a) Check the purple communication wire no. 6 between display and pump (pump connector pin no. 6). Repair when necessary.

b) Check the fuse and red power wire no.1 to pump connector no.

1 and the black ground wire no.

2 to the pump connector no. 2. Replace or repair when necessary.

c) When no issues found as stated in solution A or B, replace display. 

Cause

Control unit encountered corrupted parameters during power up and restored the production default settings.

Solution

Replace control unit.

Cause

Real time clock battery low (2,2 V) at the control unit.  

Solution

Replace control unit. 

Cause

Control unit encountered a corrupted real time clock causing the events and errors to be stored with in accurate time & dates caused by: 

• RTC battery empty
  

Solution

Replace control unit. 

This error indication shows when pump motor is disconnected due to a number of successive errors but no additional info available on the error cause. Twin pumps manufactured before September 2010 cannot provide such information to the Twin- 3 display.

Cause

Control unit encountered an unknown cause due to:

a) Display connected to a Twin-2 control unit (or a Twin-3 control unit with SW version 1063 or lower). Such a control unit does not supply additional info on the cause of the error like the Twin-3 pump does since SW version 1078

b) An error cause that is not listed in the table.

Solution

a) Replace control unit for one with a SW version 1078 or higher when the additional error information is required.

b) Replace control unit.