AFP Imaging Mini-Medical Series, Installation, Operation & Service Parts Manual

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Service
Mini Med Series
0000061122
Service Procedure 5-3
Cleaning and Servicing
Replenisher Pumps
Mini-Medical Processors utilize two high reliability, low maintenance oscillating pumps
to deliver replenishment to the developer and fix tanks. The following steps will correct
most problems that may occur.
NOTE: These pumps operate on half-wave DC. Attempting to operate them on full
wave AC (without a blocking diode in place) will lead to overheating and failure of the
pump solenoid.
If the pumps run but deliver little or no chemistry:
1) Inspect replenishment lines between replenisher tanks and pump inputs for kinks or
other damage. If installed, disassemble and clean in-line filter(s). Check all hose clamps
for security.
2) Replenishment lines should not be lengthened, nor should the tanks be positioned
such that more than 36" of chemical lift is required.
3) Check valves may be obstructed with debris or crystallized chemistry.
A) If pump will move any chemistry, try cleaning valves in place by placing
pickup tube in a container of warm water, not over 120 degrees F (49 C) and
activatlng the pumps wlth the Manual Replenishment switch. The warm
water will usually remove hardened chemical residue.
B) Stubborn deposits and larger pieces of foreign material may require that
the pump be disassembled for cleaning. Figure 5-4, below, details
disassembly of the pumps.
Clean the valves, using hot water if necessary to remove any chemical
residue. Older valves may require replacement.
When assembling, take care to install the pump valves exactly as they were
removed.
Figure 5-4, Disassembly of Replenisher Pump
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