Bunn FMD-5 User Manual

Page of 71
10
TROUBLESHOOTING (CONT.)
PROBLEM
Product overflows container
Dispenser is making unusual 
noises
Excess dust
Display not lit
PROBABLE CAUSE
1. Dispense Switch
2. Dispense Solenoid Valve
1. Plumbing Lines
2. Water Supply
3. Tank Heater
1. Fan
2. A) Hopper Drive Board - FMD-1
    B) Control board
1. Lamp
2. Lamp Holder
3. Starter - Lamp
4. Ballast
REMEDY
Refer to Service -  Dispense Switch for 
testing procedures. See page 28
Remove the solenoid valve and clear 
any obstructions. Rebuild or replace 
the valve if necessary. See page 47 
Plumbing lines should not be resting 
on the counter top.
(A) The dispenser must be connected 
to a cold water line
(B) Water pressure to the dispenser 
must not exceed 90 psi (620 kPa). 
Install a regulator if necessary to 
lower the working pressure to ap-
proximately 50 psi (345 kPa).
Remove and clean lime off the tank 
heater. See page 50
Refer to Service  - Fan for testing 
procedures. See page 32
Refer to Service - Hopper Drive 
Board for testing procedures. See 
page 35
Refer to Service - Control Board for 
testing procedures. See page 20
Refer to Service -  Lamp, see page 
39 for lamp replacement.
Refer to Service - Lamp Holder for 
testing procedures. See page 39
Refer to Service - Starter for testing 
procedures. See page 40
Refer to Service - Ballast for testing 
procedures. See page 19
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