Troubleshooting
75
GA 05.141/6.02 - 07/2003
Failure Message on
Display
TMS 1
The converter measures a
heating current of less than
300 mA when heater is on.
TMS 2
The converter measures a
heating current of more than
4 A.
TMS 3
TMS temperature sensor
reads a temperature higher
than 139
°
C.
TMS 4
TMS temperature sensor
reads a temperature lower
than 1
°
C.
Measures
Step 1: Check fuse
Replace fuse TMS (F4A, 5x20 mm) if blown.
Step 2: Check pump (heating element X31)
Check if the connector of the heating element is
connected.
The resistance of the heating element X31 is typi-
cally between 70
Ω
and 75
Ω
. In case abnormal
values are measured contact Leybold service.
Step 3: Check TMS cable
If step 2 was successful do the following:
Check TMS cable for bent pins
Measure resistance between pins X21/AA and
X21/q with the cable connected to the pump. The
resistance is typically between 70
Ω
and 75
Ω
.
Replace the cable if it is damaged or in case the
measurement of the resistance shows abnormal
values now.
Contact Leybold service.
Check the line voltage (200-240 V +10% / -15%).
Repeat step 2of failure TMS 1. In case the measu-
red value is less than 60
Ω
contact Leybold servi-
ce.
Contact Leybold service.
Check TMS sensor
Measure the resistance between pins 1 and 3 of
the TMS temperature sensor. The resistance is
typically between 110
Ω
and 150
Ω
(20
°
C to
140
°
C). Contact Leybold if the sensor is defective.
Contact Leybold service.
Measure the resistance between pins 1 and 3 of
the TMS temperature sensor. Contact Leybold if
the resistance of the sensor is under 100
Ω
.
Contact Leybold service.
Possible Cause
Fuse TMS blown.
Heating element or internal pump
connection damaged.
TMS/DRIVE cable or connectors
damaged.
Converter failure.
Overvoltage.
Heating element defective.
Converter failure.
TMS sensor damaged.
Converter failure.
TMS sensor short-circuited.
Converter failure.
