Troubleshooting - Bacharach High Performance Oilless Commercial Refrigerant Recovery Unit User Manual

Troubleshooting

PROBLEM
Unit will not start –
Fan does not run;
compressor does not start
Unit will not start –
Fan starts and runs;
compressor starts but will
not stay on
Cooling fan runs but
compressor will not start
Compressor starts but
cuts out within a few
minutes; pressure
indication on HP gauge is
high
Compressor stops
intermittently
Unit overheats
Recovery process too
slow
CAUSE
Power Cord not attached
No voltage at receptacle
Optional 80% tank full shutoff cord
not connected to tank
Float switch in tank is open
Tank is full and float switch has
opened
Circuit breaker has opened
Discharge pressure too high
HP Switch has opened
Electronics failure in motor, or on
printed circuit board
Purge valve is in "Purge" position
during recovery and HP switch
activates
Discharge valve is not open and
HP switch activates
Recovery tank valve not open
Blocked discharge hose
Air in system/tank
Vapor pressure of refrigerant in
tank is close to HP trip point
Excessive suction pressure due to
high ambient temperature
Head pressure too high
System refrigerant iced up
Restriction in hoses or manifold
gauge set
Compressor seals are worn
18
ACTION
Attach Power Cord
Verify voltage at job site
Connect cord
Check tank switch with multi-
meter
Change tanks or short cord and
use scale
Identify cause of breaker
activation, rectify and reset
Reduce pressure and rotate
Purge Valve to "Purge" and back
to "Recover"
Reduce pressure
Factory service required
Rotate Purge Valve to "Recover"
Rotate Discharge Valve to "Open"
position
Open tank valve
Check and clear blockage
Bleed air from system/tank
Reduce tank temperature
Reduce inlet pressure below
80 psi by throttling the inlet valve.
Reduce tank temperature or
change tanks
Throttle gauge manifold valves
and discharge valve to reduce
pressure differential between LP
and HP gauges
Interrupt process and allow ice to
dissipate
Check and clear restriction
Rebuild compressor – check with
wholesaler for assistance