Home-WALRUS PUMP Co., Ltd.

Q1.The motor does not run.

Cause
1. Check for correct voltage. 2. Check for water supply. 3. Check for stuck pump. 4. When working on PSW, be sure to check if the silver contact of the pressure switch is on, if not, the silver contact may go oxidized and cleaning would become necessary. 5. When the water temperature goes high, the thermostat switch would go off. Once the water is cooled, the operation would be resumed automatically. 6. If the operation fails to go on, call service.

Cause

1. Check for correct voltage.
2. Check for water supply.
3. Check for stuck pump.
4. When working on PSW, be sure to check if the silver contact of the pressure switch is on, if not, the silver contact may go oxidized and cleaning would become necessary.
5. When the water temperature goes high, the thermostat switch would go off. Once the water is cooled, the operation would be resumed automatically.
6. If the operation fails to go on, call service.

Q2.When the motor keeps running when with the water supply cut

Cause
1. Check if the faucet is tightened and whether the toilet and piping is leaking. 2. Open the check valve to check for sticking or leakage. 3. Low power supply.

Q3.SF display: No operation. The safety terminal is OFF.

Cause
1. Check the wiring protection for interruption. 2. If no SF terminal is in use, be sure to have the SF terminal be connected with COM terminal.

Q4.OPE1 display: Warning on erroneous setting.

Cause
1. Reset to run the operation once more after power off. 2. If the same message appears again,call for service.

Q5.OL display: Abnormal display with water and power off.

Cause
1. Check for cut power supply. 2. Check if the pressure sensor has signals. 3. Check the pump. 4. In OL try starting the pump until water is available every 10 minutes. 5. To force the pump to run,press STOP and then RUN to resume the operation.

Q6. EEP 1/EEP 2 display:Irregular memory.

Cause
1. Reset and then press PROG. 2. If the same problem appears, call for service.

Q7.PF01/PF02/PF03/PF04 display for irregular drive.

Cause
1. Reset to run the operation once more after power off. 2. If the same message appears again,call for service.

Q8.Remarks

Remarks
1. For safe service, be sure to turn off the pump. 2. When the red warning light in the variator goes on, be sure to keep your hands off the parts and the circuit board for electric shock. 3. In case of failure of the internal parts,do not try to replace or repair them yourself,or this office would not be responsible for consequences.

Q & A