Safety Features
Operator’s Manual 11
when the warming system temperature drops to between approximately 34ºC
and 37ºC. A yellow warning light illuminates whenever the control system
identifies an over-temperature condition.
Alarms
The WarmTouch control circuit manages and monitors operation of the patient
warming system. Should the control circuit encounter a failure condition, it
reports failures using both visual and audible alarms. The visual alarm is a yellow
warning indicator on the control panel that lights at power on, upon power
restoration following power failure, and whenever the control system identifies
an alarm condition. The audible alarm sounds intermittently or continuously,
depending on the alarm condition. Investigate immediately.
The WarmTouch control circuit recognizes two failure conditions.
1. Power On/Power Fail Alarm — This condition causes an intermittent
audible alarm and continuous visual alarm. It appears at power on and after
power failure, indicating the operator must select the desired temperature.
Upon selection of a temperature key, the system cancels the alarm and the
blower operates at the desired temperature.
2. Over-temperature Alarm — This condition causes a continuous audible
alarm and a flashing visual alarm. It appears when reaching the
temperature safety limit, and the control system turns off the heater. Once
the system air temperature returns to a safe operating temperature of
between 34ºC and 37ºC, the heater will turn back on.
If the control system determines the heater again exceeds the safety limit, the
warming system alarms once more. Take the warming system out of service
for repair by a qualified service technician.
If a power failure occurs while the warming system is in the over-temperature
fault condition, and the warming system is still in the over-temperature fault
condition when power is restored, continuous audible
and visual alarms will
activate. In this instance, the over-temperature fault cannot be cleared. Take
the warming system out of service for repair by a qualified service technician.
HEPA Filter
Caution
The HEPA filter must be changed every 2,000 hours of operation. Refer to the
Routine Maintenance section in the Service Manual for replacement procedures
requiring a qualified technician.
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