Hotsy 5700 Series - Poor or No Detergent Flow; Poor Cleaning; Unloader Cycles When Trigger Gun Is Opened or Closed; Burner Smokes or Has Obnoxious Odor

8.916-832.0 • HOTSY 5700/5800 NG Service Manual • Rev. 10/09
5
PRESSURE WASHER Troubleshooting Guide
TROUBLESHOOTING
SYMPTOM POSSIBLE CAUSES CORRECTIVE ACTION
PRESSURE
WASHER WILL
NOT PRODUCE
HOT WATER
(continued)
Inadequate water supply Fully open faucet. Check for kinked or
damaged hose. Use 5/8" minimum hose.
Check for debris clogging inlet screen.
Trigger of trigger gun released Squeeze trigger. Water must be spraying for
burner to light.
Thermostat set too low, or
defective
Raise thermostat setting. Replace if defective.
Manual gas valve not open Turn ON gas valve.
Defective gas valve Replace gas valve.
POOR OR NO
DETERGENT FLOW
Inadequate detergent supply Refill detergent container. Ensure that pick-up
screen is fully immersed and detergent con-
tainer is at or above the level of the pump.
Detergent screen or hose
clogged
Clean. Always start with a a clean detergent
container.
Clogged detergent injector check
valve
Clean check valve at detergent injector.
POOR CLEANING
Improper detergent concentra-
tion or mixing
Mix detergent per manufacturer's instructions.
Ensure that powdered detergents are fully
dissolved.
Wrong detergent for the
application.
Select appropriate detergent.
Detergent valve not opening Check that handle or knob is not slipping on
shaft.
UNLOADER CYCLES
WHEN TRIGGER
GUN IS OPENED OR
CLOSED
Air in system Open and close trigger gun several times.
Unloader defective Replace if defective.
Water leak between unloader
valve and trigger gun
Check fittings, hose, and trigger gun for leaks.
Repair or replace.
BURNER SMOKES
OR HAS
OBNOXIOUS ODOR
Stack restriction See Venting under Installation.
PRESSURE RELIEF
VALVE IS LEAKING
Excessive pressure due to
defective unloader valve
Replace unloader valve.
Defective relief valve Replace relief valve.
Dirty relief valve Clean relief valve seat.