Troubleshooting
40 Z33119_1_003
9.1 Problems & Solutions
No Problem Status LED Remote
LED
Cause Solution
1 Low cooling
power
Green
flashing
irrelevant • BCU is in cool phase
(normal state)
Wait 15 min
2 Low cooling
power
Green irrelevant • Wrong Power Mode
• Insufficient or no VT gas
(e.g. icing of the BCU due to
high humidity in the VT gas)
• BCU failure
• Check / set chiller target power in edte to Power mode:
strong
• Check CT gas flow (with BSVT: see TopSpin) and all
connections and hoses.
• Check, maintain or install dryer (see Manual of the dryer)
• Service case: contact service
3 BCU is too cold /
cannot reach
high sample
temperatures
Green irrelevant • Not enough heater power
• Too high cooling power
• In the Configuration tab in edte, adjust the maximum heater
power to a higher value.
• Remote: Reduce cooling power in edte
• Manual mode: Reduce cooling power by turning the rotary
switch to a lower position (e.g. position 2 ->1)
4 BCU does not
respond at all
rotary switch
positions
Off Off • No electrical power or
transport damage
• Connect the power cable to the power socket of the BCU.
• Check the power cable and the main fuse.
• Turn the main switch to positon ON
• Check the fuse of the BCU I
• Service case: contact service.
5 BCU does not
respond at all
rotary switch
positions
Red flashing Red • BCU firmware is corrupt • With BSVT: Download BCU firmware (again).
• With BVT: Service case, contact service.
6 BCU does not
respond at all
rotary switch
positions
Red fast
flashing
Off • BIS is corrupt • Service case: contact service.
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