Bunn HC-2 HC-3 Operating & Service Manual page 11

TROUBLESHOOTING (CONT.)
PROBLEM
Dispenser is making unusual
noises
Excess dust
Display not lit
PROBABLE CAUSE
1. Plumbing Lines
2. Water Supply
3. Tank Heater
1. Fan
2. Hopper Delay Board
3. Transformer (240V 2 Wire
Models Only)
1. Lamp
2. Lamp Holder
3. Starter - Lamp
4. Ballast
11
REMEDY
Plumbing lines should not be rest-
ing 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 33
Refer to Service - Fan for testing
procedures. See page 19
Refer to Service - Hopper Delay
Board for testing procedures. See
page 22
Refer to Service - Transformer for
testing procedures. See page 35
Refer to Service - Lamp, see page
24 for lamp replacement.
Refer to Service - Lamp Holder for
testing procedures. See page 24
Refer to Service - Starter for
testing procedures. See page 25
Refer to Service - Ballast for
testing procedures. See page 15
27591 061500