FCI Watermakers MAX-Q+, User Manual & Installation Manual

Page: 127 / 170

FCI WATERMAKERS, INC. 127 Troubleshooting
One of the most important steps in a high pressure system is to establish a
regular maintenance program. This will vary slightly with each system and
is determined by various elements such as the duty cycle, the liquid being
pumped, the actual specifications vs. rated specifications of the pump, the
ambient conditions, the inlet conditions and the accessories in the system. A
careful review of the necessary inlet conditions and protection devices required
before the system is installed will eliminate many potential problems.
These pumps are very easy pumps to service and require far less frequent service
than most pumps. Typically, only common tools are required, making in‑field service
convenient, however, there are a few custom tools special to certain models that do
simplify the process. Table 4 will assist in troubleshooting the high pressure pump.
HIGH PRESSURE PUMP TROUBLESHOOTING GUIDE
Table 4: High Pressure Pump Troubleshooting Guide
Problem Probable Cause Solution
LOW PRESSURE Air leak in inlet plumbing. Tighten fittings and hoses. Use PTFE liquid or tape.
Pressure gauge inoperative
or not registering accurately.
Check with new gauge. Replace worn or damaged gauge.
Inlet suction strainer (filter)
clogged or improperly sized.
Clean/adjust relief valve. Replace worn seats/valves and o-rings.
Abrasives in pumped liquid. Clean filter. Use adequate size filter. Check
more frequently. Install proper filter.
Leaky discharge hose. Replace discharge hose with
proper rating for system.
Inadequate liquid supply. Pressurize inlet.
Severe cavitation. Check inlet conditions.
Worn seals. Install new seal kit. Increase frequency of service
Worn or dirty inlet/
discharge valves.
Clean inlet/discharge valves or install new valve kit.
PULSATION Foreign material trapped
in inlet/discharge valves.
Clean inlet/discharge valves or install new valve kit..
WATER LEAK
• Under the manifold
• Into the crankcase
Worn V-Packings or
Lo-Pressure Seals.
Install new seal kit. Increase frequency of service.
Worn adapter o-rings. Install new o-rings.
Humid air condensing into
water inside the crankcase.
Install oil cap protector. Change oil every 3 months or 500 hours.
Excessive wear to seals
and V-Packings.
Install new seal kit. Increase frequency of service.
KNOCKING NOISE
• Inlet supply
• Bearing
• Pulley
Inadequate inlet liquid supply. Check liquid supply. Increase line size, pressurize.
Broken or worn bearing.
Replace bearing.
Loose pulley on crankshaft Check key and tighten set screw.