Grindmaster AMERICAN METAL WARE 87710 - Manual (Page 14)

American Metal Ware 87710E Coffee Urn Page 15
Problem
Possible Cause
Service Check
Remedy
Remove and clean micromesh screen filter located in water strainer
.
If volt
age missing or incorrect, check
wiring for looseness, breaks, and proper connections. Clean out and/or replace plunger assembly or entire valve. May require new coil. Caution is advised to avoid damage to valve. See valve instruction sheet. Replace coil.
Also check for frozen
plunger
. See valve instruction sheet.
Replace electrode assembly
. If no
remedy
, check for improper wiring
(cut insulation) or electrode tip
s
touching met
al.
Replace Dual Level Control. Replace electrode assembly
.
Push wire lead connector securely onto terminal(s). Replace connector if wire is frayed or broken. Replace Dual Level Control.
W
ater pressure before
strainer and not af
ter
.
Check for 120V
AC
across “H” and “N”
ter
-
minals. Disassemble. Jumper from “FILL”
ter
-
minal to “H” terminal does not st
art fill.
Tank fills with electrode wire disconnected from “HI” terminal. Tank does not fill with electrode wire disconnected from “HI”
terminal.
Tank fills with electrode wire disconnected from “HI”
terminal.
V
isual. Check “C” and
“HI” probe terminals as well as “FILL”.
Also
check neutral (white) wire at valve. Tank does not fill with electrode wires discon
-
nected from “XL” and “H”
terminals.
3) W
ater strainer
clogged. 4) No power on Dual Level Control. 5) Fill solenoid valve clogged with scale or frozen closed. 6) Fill solenoid valve coil inoperative. 7) Electrodes shorting to ground. 8) Dual Level Control faulty
.
1) Electrode shorting to ground completely or intermittently
.
2) Loose connection. 3) Dual Level Control faulty
.
C)
Auto refill fails to fill
water t
ank (continued).
D)
Auto Refill is erratic.
IV) Trouble Shooting Auto Refill, Low Water Cutoff, and Dual Level Control System (continued)