Groen 2TRI-RES-20G, Service Manual

Page: 27 / 44

PART NUMBER 152797 REVISION A
CALL 888-994-7636 FOR TECHNICAL SUPPORT 27
corresponding sensor is on.
Level 1 Hi Limit Power On
Level 2 Fan Current
Door
During this test various push buttons operate valves and the fan
motor.
START controls the water inlet valve for the center reservoir.
CANCEL
controls the inlet valves for the two side reservoirs.
MOISTURE LEVEL HI
controls the center reservoir drain valve.
MOISTURE LEVEL LO controls the drain valves for the two side
reservoirs.
All four of these are push-on/push-off.
The
FAN SPEED HI
and
FAN SPEED LO
push buttons control
the cavity fan motor.
These two are momentary.
Begin the test with all valves closed, that is, with the a.
corresponding LEDs off.
Push START to begin filling the center reservoir. i.
In about a minute the water level will rise and contact ii.
the center water level probe.
The Level 1 bar will turn on.
iii.
Push START again to turn off the water inlet valve. iv.
Push MOISTURE LEVEL HI to open the center drain v.
valve.
In less than a minute the Level 1 bar will turn off.
vi.
If not check the connections and clean the level vii.
probe.
Repeat the test in the two outer reservoirs using the b.
CANCEL and MOISTURE LEVEL LO push buttons.
Open the door. The Door bar should light. c.
Close the door. The bar should go out.
If not check the connections, the magnet in the door,
the door alignment, and the door sensor inside the
control panel housing.
The power switch should be on and the Power On bar d.
should be lit.
If not then push the ON switch.
On the Relay board unplug the Hi Limit connector (two e.
white wires in a small 4-pin connector) from J8 (near
the center of the board).
Use a small screwdriver and short the center and right i.
pins of J8 together.
The Hi Limit bar should light and the Power On bar ii.
should go out.
Remove the screwdriver.
iii.
The Hi Limit bar should go out. iv.
IMPORTANT: replace the Hi Limit connector on J8. v.
Push the FAN SPEED HI button. vi.
The Fan Current bar should light. vii.
Release HI and push LO. viii.
The bar should light again. ix.
Release the button. x.
The bar should go out. xi.
If not then check the connections and the fan motor. xii.
TEMP KNOB 22.
This test checks the temperature knob (the upper knob).
Turn it clockwise.
The TEMPERATURE display should increase in five degree steps
from 200 to 450.
ALL ON 23.
This test checks everything lights up.
Look at all LEDS, seven-segment displays and decimal points.
Everything should be lit. If not then replace the control board.
EXIT 24.
This is the way out of the diagnostics.
Push START.
The control board resumes normal operation
troubleshootIng