![Hico Medical Systems HICO-VARIOTHERM 550 Instructions For Use Manual Download Page 61](http://html1.mh-extra.com/html/hico-medical-systems/hico-variotherm-550/hico-variotherm-550_instructions-for-use-manual_2129330061.webp)
Troubleshooting
HICO-VARIOTHERM 550
61
Fault
Possible causes
Action
Alarm + Display message:
"CHECK UNIT"
"->CUSTOMER SERVICE"
1. Various defects
2. Water tank empty
3. Sensor break/closure T1
4. Sensor closure T2
1. Customer service*
2. Refill water*
3. Customer service*
4. Customer service*
Alarm + Display message:
"CHECK UNIT"
"UNDERTEMPERATURE"
1. Unit too cold (< 9 °C)
2. Sensor break T2
3. Water tank frozen
1. Heat up unit at room
temperature for a while*
2. Customer service*
3. Defrost unit*;
Examine unit for frost damage
(Is water flowing out of the
unit?)
Customer service
Entire device not functioning
acoustic alarm
1. Mains failure
2. Mains connector no contact
3. Fuse defective
4. Unit defective
1. Switch off unit until power
returns
2. Check connector on unit and
in socket for correct fit
3. Customer service*
4. Customer service*
*
Switch off the unit immediately