Southbend CG90-1 - Manual (Page 29)

C OMBINATION O VEN
T ROUBLESHOOTING
O PERATOR ’ S M ANUAL 1180963 P AGE 29
TROU
BLE
S
H
OOTI
N
G
Unit Not Steaming Properly in Steam Mode or Combi Mode
Unit Not Steaming Properly in Steam Mode or Combi Mode.
Check water pressure at unit with unit running.
Disconnect plug PL3 and place test leads in harness side of
plug. Operate unit in steam mode. Wait until steam mode
LED stops flashing. Check voltage.
Does voltage
rise and fall from 0 to
approximately
24 volts?
Turn unit off. Remove
right side exterior cover
from unit, if desired.
Is resistance
between 1 and 10
megaohms?
Replace
solenoid valve.
Turn-off water supply to unit. Remove
water-supply copper tube from
compression fitting at inlet to solenoid
valve inside unit. Attach one end of 1/4"
ID hose to tube and place other end in
drain or bucket. Turn water supply on.
No Yes
No Yes
Significant
water flow
(>1/2 gpm)?
Remove screen from
strainer on back of unit.
Clean or replace screen.
Remove solenoid valve and
flow regulator. Examine for
deposits or debris that would
impede water flow. Clean and
replace as necessary.
No Yes
Check wiring.
Replace board.
Check solenoid valve
coil resistance.
Unit steaming
properly?
Replace pressure
regulator on back of unit.
Finished
No Yes
Turn unit on in steam
mode.