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