Troubleshooting Guide - Viessmann VS 34 Owner's Manual

PROBLEM
No soft water
Water hard sometimes
Motor stalled or clicking
Error code E1, E3 or E4
displayed.
Error code E5 displayed.
TROUBLESHOOTING - INITIAL CHECKS
Always make these initial checks first:
1. Is display blank? Check power source.
2. Is Error code displayed? If so, go to "Automatic
Electronic Diagnostics" on the next page.
3. Is correct time displayed? If not, recharges occur at
the wrong time. Set current time (See Page 14.)
4. Is there salt in the brine tank? If not, refill.
5. Is salt "bridged" (See Page 23)?
6. Are plumbing bypass valve(s) in service position?
7. Are inlet and outlet pipes connected to the water sof-
tener inlet and outlet respectively?
8. Is valve drain hose free of kinks and sharp bends,
and not elevated over 2 meters above the floor.

Troubleshooting Guide

CAUSE
No salt in the storage tank.
Salt is "bridged."
If display is blank, power supply may be
unplugged at wall outlet, power cable
leads may be disconnected from the elec-
tronic control board, fuse may be blown,
circuit breaker may be popped, or power
supply may be plugged into a switched
outlet which is "off."
Bypass valve(s) in bypass position.
Dirty, plugged or damaged nozzle & ven-
turi.
Valve drain hose plugged or restricted.
Bypassed hard water being used during
recharge, due to current time or recharge
time settings being incorrect.
Hardness number setting is too low.
Hot water being used when softener is
recharging.
Increase in actual hardness of water sup-
ply.
Turbine is not turning freely.
Motor malfunction or internal valve fault
causing high torque on motor.
Fault in wiring harness, connections to
position switch, switch, valve or motor.
Electronic control malfunction.
Add salt (See Page 23) and then initiate a
"Recharge now," as shown on Page 14.
Break salt bridge (See Page 23) and then initiate a
"Recharge now," as shown on Page 14.
Check for power loss due to any of these and cor-
rect. When power is restored, if the display shows
the "Current Time" setting screen (Figure 38 on
Page 14), it means time was lost during the outage.
Set the current time. Other settings such as hard-
ness are retained in memory during a power loss.
Place bypass valve(s) in service position.
Take apart, clean and inspect the nozzle & venturi
assembly, as shown on Page 24.
Drain hose must not have any kinks, sharp bends,
or be raised too high above the softener.
Check the current time displayed. If not correct,
refer to "Set Current Time" on Page 14. Check the
recharge time, as described on Page 15.
Referring to "Setting Hardness" on Page 15, check
the current hardness setting and increase if needed.
Avoid using hot water during recharges, because
water heater refills with hard water.
Have unsoftened water sample tested. Referring to
Page 15, check the current hardness setting and
increase if needed.
Check turbine, as described on Page 26.
Contact a service technician.
Contact a service technician.
Contact a service technician.
9. Is the brine tube connected?
10. Check the hardness setting (See "Setting Hardness
on Page 15). Be sure it is correct for the house-
hold's water supply. Perform a hardness test on a
raw water sample to compare with the setting.
11. Perform a hardness test on a softened water sam-
ple to determine whether a problem exists.
If no problem is found after making the initial checks,
proceed to "Troubleshooting - Manual Diagnostics" and
"Manual Advance Recharge Check" on the next two
pages.
25
CORRECTION