Troubleshooting guide

25
VMIFB202
Defective Honeywell 3-way valve
Action:
The motor should set the valve to the relevant end position depending on operating conditions. If it does not, hot water from the water
heater will mix with the radiator water.
Check the function of the 3-way valve motor by test running it manually.
MANUAL TEST - REV.V. HOT WATER
0=Radiator mode, arm out from the valve. (terminal 6 no voltage)
1=Hot water mode, arm positioned towards the valve. (Both terminal 3 and 6 voltage)
If the motor does not shift mode during manual test operation, check that there is voltage to the motor.
Terminal 3 =Continuous phase 230Vac
Terminal 6 =signal at hot water production
Plinth N =Neutral
If there is voltage to the motor but the arm does not shift mode,
Replace either the 3-way insert or the whole 3-way.
NOTE! If the white lever on the motor goes up and down all the time there is a short circuit in the motor, replace the motor.
Defective 3-way valve LK armature
Action:
Check the function of the 3-way valve motor by test running it manually.
If the motor does not shift mode during manual test operation, check that there is voltage to the motor, Terminal 3 =continuous phase
230Vac.
Terminal 6 = signal HW
Plinth N =Neutral
MANUAL TEST - REV.V. HOT WATER
0=Radiator mode, the red marker should be on AB/B. (terminal 6 no voltage)
1=Hot water mode, The red marker should be on AB/A. (Both terminal 3 and 6 voltage)
Detach the motor and test closing and opening the valve by turning the shaft.
If there is no voltage replace the motor.
If it is sluggish or jams, replace with a new 3 way valve.
Troubleshooting Guide Thermal comfort