GD-900 / GD-1000
Troubleshooting Guide
Contents
GD-900 Heater Panel Connections 1
GD-900 Control Panel 2
GD-900 Control Panel PCB 3
GD-900 Rear Control Panel PCB 4
GD-1000 UL(US specification) parallel connection 5-9
GD-1000 CE(European specification) series connection 10
GD-1000 Heater Panel and Troubleshooting 11
GD-1000 Control Box Circuit Board
UL(US specification) 12
GD-1000 Control Box Circuit Board
CE(European specification) 13
GD-1000 Control Box Fuse and Troubleshooting 14
GD-900/GD-1000 Structure Diagrams 15-23
2006.04.20
GD-900 Heater Panel Connections
- 1 -
Under CE specification: series connection
Under UL specification: parallel connection
- 2 -
GD-900 Control Panel
Timer display:
1.Under low temperature,
the longest it can show
is 12 hours.
2.Under middle or high
temperature, the longest
it can show is 1 hour.
Red light:
high temperature
which is section 8~9.
Yellow light:
mid temperature
which is section 5-7.
Green light:
low temperature
which is section 1-4.
Temperature display:
section 1-9
Power On/Off
Temperature control
Timer control
Front panel
Switch mode of time
display from hours
to minutes
Notice: 1. Fragile device, do not break.
2. Be cautious to avoid water.
Back panel
- 3 -
GD-900 Control Panel PCB
Welding point on the heater panel
Connecting outlet of heater panels
Old type
GD-900 Rear Control Panel PCB
- 4 -
Transformer:
Defect: the pad
would not heat up
Relay
Defect: the pad
would not heat up
Connection to power
Connection to heater panel
Fuse build-in
Defect: the pad
would not heat up
New type
Timer display:
1.Under low
temperature, the
longest it can show is
12 hours.
2.Under middle or high
temperature, the
longest it can show is
1 hour.
Red light:
high temperature
which is section 8~9.
Yellow light:
mid temperature
which is section 5-7.
Green light:
low temperature
which is section 1-4.
Temperature display:
section 1-9
Heat Sink
- 5 -
GD-1000 UL(US specification)
parallel connection
Installation of heater
panel(A1, A2) in the
upper dome
A1 Heater panel (long cord)
A2 Heater panel (short cord)
- 6 -
Power cord
in the upper
dome
1. Parallel connecting of
heater panel A1 and A2s’
power cords(red)
2. Series connecting of
heater panel A1 and A2s’
power cords(white)
A1 red power cord
GD-1000 UL(US specification)
series connection
A2 red power cord
A1 white power cord A2 white power cord
- 7 -
GD-1000 UL( US specification)
parallel connection
Installation of heater
panel(B1, B2) in the
under dome
Heater panel B1 ( long cord )
Heater panel B2 (short cord )
GD-1000 UL( US specification)
parallel connection
- 8 -
Installation of heater
panel C in the under
dome
Base board of under dome
Heater panel C
Pressed board of under dome
GD-1000 UL( US specification)
parallel connection
- 9 -
Power of
under dome
1. Parallel connecting of
heater panel B1, B2 and
Cs’ power cords (white).
2. Parallel connecting of
heater panel B1, B2 and
Cs’ power cords (red).
GD-1000 CE(European specification)
series connection
- 10 -
Power cords in the
upper dome
1. Installation of upper dome and under dome for GD-1000
CE(European specification) is the same as under UL(US
specification).(Please see page 5,7,8)
2. Please see the figure below for power cords in the upper and
lower dome under CE(European specification) for GD-1000.
Power cords in
the under dome
1. Series connecting of
heater panel A1 and A2
2. Weld the other end of
power cords of heater
panel A1 and A2 on the
outlet.
1. Series connecting of
heater panel B1 and B2s’
power cords.
2. Parallel connecting of
heater panel B1 and Cs’
power cords.
3. Parallel connecting of
heater panel B2 and Cs’
power cords.
B1 red power cord
B2 red power cord
B1 white power cord
B2 white power cord
C red power cord
C white power cord
A1 red
power cord
A2 white
power cord
A2 red
power cord
A1 white
power cord
B1 white
power cord
B2 red
power cord
B2 white
power cord
C white
power cord
B1 red
power cord
C red
power cord
GD-1000 Heater Panel
- 11 -
Heater Panel
Fuse
Temperature switch
If there is a problem with the
fuse, it can be cut off and
replaced or just use without
a fuse. Just connect with
appropriate portion of power
cord to reconnect it.
Troubleshooting:
If there is a single piece of heater panel that is not working, please check:
1. If the fuse has brunt off or not;
2. If the temperature switch is well conducted;
3. If there is a broken of any welding point;
4. Accurate welding point on the outlet and wiring on upper and under
dome(as figures attached)
- 12 -
GD-1000 Control Box Circuit Board
UL(US specification)
J2 power cord
(black and white)
output for under
dome
Power cords
( black, white and green)
Input Voltage: 110V
Provide power for upper
and under dome
Transformer
Red and white cords: connect to the fuse
Connect to
the Buzzer
J1 po we r c ord
(black and white)
output for upper
dome
Relay
- 13 -
GD-1000 Control Box Circuit Board
CE(European specification)
- 14 -
GD-1000 Control Box Fuse
Fuse
Troubleshooting:
All of the heater panels are not heating up or there is no power from the
contrl box or the light :
1.Check if power cords are correctly connected for upper and lower dome.
2.If the fuse for the power cords is intact.
3.If there is a malfunction of transformer.
4.If there is a malfunction of relay.
If the fuse is broken or any
defect occurs:
1.The light will not function;
2.Domes will not heat up
or work;
UL specification: 10 A 250V
CE specification: 6.3 A 250 V
J2 power cord
(blue and brown)
output for under
dome
Transformer
Red and white cords:
connect to the fuse
J1 po we r c ord
(blue and brown)
output for upper
dome
Connect to
the Buzzer
Relay
Power cords
(blue, brown and green)
Input Voltage: 220V
Provide power for upper
and under dome
EMI filter
GD-900/GD-1000
Structure Diagrams
- 15 -
16
17
18
19
20
21
22
23
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