mr.steam
®
Installation, Operation & Maintenance Manual
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I
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S
T
A
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15
SYSTEM STATUS CODES
The control (either iSteam
®
, AirTempo
®
, iTempo
®
or iTempo/Plus
®
) may display a status code if the steam generator is not functioning
properly.
Code
Code Meaning
Probable Cause
Suggested Remedy
H20
Water level is not
Water Supply is off
Turn on Water Supply
satisfied within 5 min.
Defective water feed solenoid
Check/replace water solenoid valve
Water feed probe not functioning
Check/clean probe.
Check probe wiring.
Drain Valve Open
Check/Close drain valve
AutoFlush not functioning
Check/Replace AutoFlush
Prr1
Temperature Probe Error
Control cable/MSTS cable cut
Replace control cable / MSTS
or Prr2
Internal problem with control/MSTS
Replace control / MSTS
Err1
Incorrect Field Supply Voltage
Incorrect voltage supplied
Supply steam generator with the correct
(green light on liquid level
to Generator
voltage noted on the data plate label.
control board will be off)
Err2
Button on control is pressed
Control cover misalignment
Remove and reinstall control cover
for more than 5 minutes
Debris behind control cover
Remove control cover and clean cover,
control and keypad with a damp cloth
Errb
Water level not satisfied in a tandem set up - Check secondary generators, see H20.
Err7
Liquid Level Control Board malfunction
Memory error in LLCB
Press ON/OFF to clear.
Replace control if code remains.
LIQUID LEVEL CONTROL BOARD
Explanation of LED Indicators
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GREEN
LED is ON when there is 208/240 Volt incoming power connected,
24 Volt transformer secondary output and on-board 5 Volt DC control power are present.
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YELLOW
Water level indicator–LED is OFF when no water is detected (for more that 5 seconds). ON when
water level is satisfactory. For units with AutoFlush, if more than five hours have elapsed since
last usage and this LED is ON it is indicative of an AutoFlush or water level probe circuit malfunction.
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RED
Contactor relay indicator–LED is ON when relay is closed and sending 24 Volts to the
contactor coil. (This LED comes ON if the generator is ON.)
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FORCE ON
Press this button to operate the generator. This button is for trouble shooting only and will operate
TEST BUTTON if a control is connected or not. Pressing the button again will shut the generator OFF. The test button
will only allow the generator to operate for 10 minutes.
Liquid Level Control Board
PN 104288
(shown without wiring)
Force On
Test Button
Yellow
(Water Level)
Green
(Power)
Red
(Heater)
All drawings are for illustrative purposes only
