Diagnostics And Service Information - GE JS998 Series Technical Service Manual

Diagnostics and Service Information

WARNING: To prevent electrical shock, use
extreme caution when diagnosing oven with
outer covers removed and power on. The
high voltage circuit of the magnetron power
area (HVT, capacitor, diode, magnetron) is
4400V potential with respect to ground. Wait
at least 5 minutes after disconnecting
power before servicing the magnetron
power area.
WARNING: Heat sinks on main power
board are electrically live. Take special
precautions when troubleshooting the main
power board with power on. If the main
power board has failed, the board capacitor
can hold a voltage charge on the heat sinks.
Wait at least 5 minutes after disconnecting
power before servicing the main power
board.
POWER MONITOR ERROR CODES
During Power-Up (occurs only during power-up)
Normal Power– L1-L2
No message >150VAC
SUPPLY OPEN L1-L2
NEUTRAL NA
SUPPLY L1-L2
MISWIRED <90VAC
L1-L2
NA
SENSE 120V L1-L2
ENTERING >90VAC and <150VAC
SALES MODE
After Power-Up (can occur anytime during operation)
Normal Power– L1-L2
No message NA
SUPPLY OPEN L1-L2
NEUTRAL NA
SUPPLY L1-L2
MISWIRED NA
LOW POWER L1-L2
<150VAC
Note: Low Power supersedes Supply Open Neutral
L1-N
>90VAC AND <150VAC
L1-N
<90VAC
L1-N
>90VAC AND <150VAC
L1-N
>150VAC
L1-N
>90VAC AND <150VAC
L1-N
>90VAC AND <150VAC
L1-N
<90VAC
L1-N
>150VAC
L1-N
NA
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