Troubleshooting Guide; Product Replacement Parts - 3M ScaleGard HP Installation And Operation Instructions Manual

Troubleshooting Guide

Problem
Unit Runs Low or Out of Water
System shuts down and "service"
indicator light turns on
TDS of product water too low
TDS of product water too high
TDS of product water too high with
no blending
TDS meter not operating
Replacement Parts
Part Number
96-410501
60-9052
22-518801
8500557
60-125001
85-9274
89-3220101
89-2302
5613529
5626903
6232631
24-5500101
25-15503Z
50-92101/Z
Possible Cause
Undersized tank for store demand
RO production is to low for store
demand
Slow leak in the distribution line
RO membrane flow control
improperly installed or missing
Pre-Filter plugs
RO membrane fouls (normal
conditions)
RO membrane fouls (high feed
water hardness/TDS)
Interrupted feedwater supply
Low feedwater pressure (below
30 psi)
Blend too low
Blend to high
RO membranes defective
Low battery
Description
Pressure Reducer/Regulator (Contact Dealer)
Inlet ball valve (Contact Dealer)
PLC (Contact Dealer)
Pressure Gauge (Contact Dealer)
Permeate Solenoid (Contact Dealer)
Shroud (Contact Dealer)
Pump Head (Contact Dealer)
Pump Motor (Contact Dealer)
HF90-CL-RO Pre-Filter
HFRO 500 Cartridge
TDS Monitor
Flow Switch
Pressure Switch (40/60 psi)
Inlet Solenoid (Contact Dealer)
Solution
Install additional storage tank capacity
Install RO add-on head and cartridge
Upgrade from HFRO 500 to HFRO 700
Cartridge
Repair leak
Properly install RO membrane Flow control Note: Reference RO cartridge change-out instructions
Replace Pre-Filter
Replace RO membrane
Ensure drain line is not kinked or plugged.
Replace if needed.
Install RO add-on head and cartridge
Install water softener upstream
Press Reset button on top of electrical
enclosure
Contact plumber to resolve problem
Re-adjust blending valve to allow more
blending
Re-adjust blending valve to allow less
blending
Replace RO membranes
Replace TDS meter batteries
10
Notes
Contact Dealer
Contact Dealer
The unit produced RO water slowly. A dripping leak can
prevent the tank from filling.
A more frequent schedule change-out may be needed
Check for: 1. feedwater pressure, 2. production flow
rate, 3. drain flow rate before replacing RO membrane
Contact Dealer
Reference system startup procedure
Reference system startup procedure once low feed
water problem is resolved
Reference Blending Valve Adjustment
Reference Blending Valve Adjustment
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