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Troubleshooting
HICO-VARIOTHERM 550
60
9.2 Fault causes and troubleshooting
Fault
Possible causes
Action
No or insufficient water circulation
1. Hoses or pad kinked
2. Couplings are not engaged
3. Unit is positioned far below
the water pad
4. Intense foam formation
5. High patient weight
6. Pump worn/defective
1. Ensure correct laying and
positioning
2. Insert couplings firmly into
each other
3. Position unit at same height or
above
4. Replace water*
5. Position unit higher than the
water pad
6. Customer service*
Couplings stiff
Sealing ring dry and brittle
Grease sealing ring with vaseline,
silicone grease or similar
Coupling connection drips
constantly
Exterior, visible sealing ring
damaged or missing
Replace sealing ring*
Coupling valve of the non-
connected coupling drips
constantly
1. Inner sealing ring damaged
2. Inner sealing ring
contaminated
1. Customer service*
2. Insert and loosen coupling
several times, if necessary
customer service
Alarm + Display message:
"ALARM TEST DEFECTIVE"
"->CUSTOMER SERVICE"
1. Independent protection device
defective
2. Pump defective electrically
Customer service*
Alarm + Display message:
"TEMP.DIFF. >1 °C"
Coupling or decoupling of the
water pad during operation
Acknowledge alarm with “Alarm
OFF” button
Alarm + Display message every
10 mins.:
"TEMP.DIFF. >1 °C"
1. Cooling power insufficient
2. Cooling elements or pump
defective
3. Intense foam formation in the
tank
4. Bypass interrupted
1. See next line
2. Customer service*
3. Replace water*
4. Customer service*
Nominal value is not reached
during cooling
Cooling power insufficient
because:
1. Ambient temperature too high
and/or
2. nominal value too low and/or
3. Water pad too large
(2 water pads)
The 3 causes indicated reinforce
each other unfavourably so that at
least one cause must be
changed.
Alarm + Display message:
“WATER LEVEL!?“
Can be acknowledged for 10
mins. using the "Alarm OFF"
button
1. Water level too low
2. Unit is not horizontal
3. Sensor deviation
1. Refill water
2. Position unit horizontally
3. Customer service*