American Metal Ware 74110, Инструкция по установке, эксплуатации и обслуживанию

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IV. Trouble Shooting Auto Refill, Low Water Cutoff, and Liquid Level Control System.
PROBLEM POSSIBLE CAUSE SERVICE CHECK REMEDY
A. Overfilling of water compart-
ment when power to urn is
″
OFF
″
.
1. Fill solenoid valve leaking due
to dirt or scale holding valve
open, or worn plunger seat. Disassemble and clean out. May require new
plunger assembly. Caution is advised to avoid
damage to valve. See S301 valve instruction
sheet.
2. Fill solenoid valve installed
backwards. Visual. Install so that port marked
″
IN
″
is Connected
to outside fresh water supply.
B. Overfilling of water compart-
ment only when power to urn is
″
ON
″
1. High electrode mated with
scale. Jumper from HIGH terminal to urn
body stops fill. Remove electrode assembly. Clean both elec-
trodes. See
note 1
2. Missing or faulty common
connection for electrode circuit.
(COM terminal to urn body.) Jumper from COM terminal (next
to HIGH) to urn body stops fill. Make good, secure connection.
3. Liquid level plug-in relay
faulty. Plug-in relay pushed all the way
onto socket. Replace liquid level control, if problem con-
tinues with relay plugged in all the way.
4. Liquid level printed circuit
board faulty. Replace liquid level control.
C. Auto refill is erratic in filling.
(Sometimes fills, sometimes
doesn’t) 1. Electrodes shorting to ground
completely or intermittently. Urn fills with electrode wires dis-
connected from HIGH and LOW
terminals. Replace electrode assembly. See
note 1
.
2. Liquid level plug-in relay
faulty. Plug-in relay pushed all the way
onto socket. Jumper from NC ter-
minal to adjacent COM terminal
starts fill. Replace liquid level control, if problem con-
tinues with relay plugged in all the way and
urn fills only with jumper in place.
3. Liquid level control faulty. Urn does not fill with electrode
wires disconnected from HIGH and
LOW terminals. Replace liquid level control.
D. Auto refill fails to fill water
compartment. (Low water cutoff
failure if heat comes on.) 1. No power at urn. Nothing operates on urn. Make sure main switch(es), fuse(s), circuit
breakers) provide power to urn, that fuse* on
urn is OK, and master switch, if provided, is
on. * - or circuit breaker
2. No water at urn. No sprayover on automatic urns. Make stirs all water supply line valves are
open.
3. First stage (outside) regulator
clogged. Disassemble and clean out. May require
renewal parts.
4. First stage (outside) regulator
backwards. Visual Install so that port marked
″
IN
″
is connected
to outside fresh water supply.
S6161-JB-FSE-010
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