Southbend SEZ-5 - Manual (Page 22)

T ROUBLESHOOTING SEZ S ERIES C OUNTERTOP S TEAMERS
P AGE 22 O PERATOR ’ S M ANUAL 1181587
TROU
BLE
S
H
OOTI
N
G
“Service Request” Light Comes On During Operation
DISCONNECT POWER AT CIRCUIT BREAKER.
“Service Request” light comes on during operation.
Is water level
at or above normal level
in cavity?
Yes No
Check for adequate water pressure to unit.
DISCONNECT POWER AT CIRCUIT BREAKER.
Remove control panel, but leave plugged in.
Leave all wires connected to R1 relay, but pull back
connectors enough to allow meter-probe access.
DISCONNECT POWER AT CIRCUIT BREAKER.
Turn unit off and check that unit drains fully.
Open door. Turn unit back on and wait 30 minutes.
Yes No
Does water
level exceed normal
level?
Disconnect water inlet assembly at
compression fitting.
Attach pressure gauge to copper tube and check
pressure downstream of regulator.
Shut water off as close to steamer as possible.
Remove rear cover from unit.
Disconnect water supply.
Check float valve (see
Figure 16 on page 33).
Clean or replace as
necessary.
Adjust or replace
pressure regulator.
Yes No
Pressure above
3 psig?
Replace solenoid valve.
Yes No
Reconnect power to unit. WAIT 9 MINUTES.
Is resistance
over 1000 ohms?
Check voltage across R1 coil (where wires B42 and
B70 are connected).
Does voltage
match serial plate
voltage?
Check float switch and
replace as necessary
(see Figure 14 on page
31).
Yes No
Shut off water supply as close to steamer as possible.
Remove screen from strainer and clean or replace as necessary. Reassemble, reconnect, and
recheck the steamer. If the Service Request light still comes on, examine the following for obstructions
or deposits: pressure regulator, solenoid, and float valve. Clean or replace as necessary.
Check resistance between terminal block position 1
and NO terminal on R1 relay (where wire B72 is
connected).
Check voltage between NO and C
terminals on R1 relay (where wires
B72 and B71 are connected).
Does voltage
match serial plate
voltage?
Yes No
Replace R1 relay
(part # 1181545).
Check high-limit
thermostats (see Figure
18 on page 35) and
replace as necessary.