13
USER MANUAL
TUNWAS12-100
v.1.1
TROUBLESHOOTING
IMPORTANT:
The following troubleshooting guide highlights some common problems. Some users may experience and be able to rectify without
specialist training. For these and any other issues, faults or problems with the equipment that you are unsure about we recommend that you
contact your Tundra Industrial dealer for advice on service and repair:
PROBLEM
CAUSE / REMEDY
Motor will not start
1. Check plug for loose connections or a blown fuse
Water leaking from the pump
1. The system will generate small amounts of leakage during operation and this is
normal. If leaking is extreme disconnect from water and mains power before checking
all connections are secure and fittings are free from dirt or damage.
Circuit breaker tripping or blown fuse
1. Circuit is overloaded
2. Check extension cable. Problems can arise if cable is too long or too thin.
3. Nozzle is partially blocked causing excessive pressure to build up
Trigger jams
1. Check that the gun safety lock is not engaged
Pump and motor do not stop when trigger is
released
1. Trigger is damaged. Contact your dealer.
The motor is running but pump is not
operating at the correct pressure
1. Air trapped in the pump. (Let the washer run with the gun open and lance removed
for a period of time until a steady stream of water is released.
2. Suction or discharge valves are clogged or worn out. Check that water filter is not
clogged or damaged. Contact your dealer.
3. Check for a kink in supply hose and that water tap is turned on to full supply
pressure.
Fluctuating pressure
1. Worn or faulty valves. Check and replace
2. Pump sucking air. Check that the hoses and connections are air tight.
3. Worn piston packing. Contact your dealer.
4. Dirty water filter. Check and clean if necessary.
5. Dirty nozzle. Check and clean if necessary.
Oil dripping from the pump
1. Worn seal. Check and replace (contact your dealer)
2. Loose drainage bung or dipstick. Check and tighten if required.
Noisy pump
1. Worn bearings. Contact your dealer.
2. Pump sucking air. Check that the hoses and connections are air tight.
3. Dirty water filter. Check and clean if necessary.
4. Dirty nozzle. Check and clean if necessary.
5. Valves worn or dirty. Check, clean, replace (contact your dealer)
