Common Problems - Philips Avalon CTS M2720A Service Manual

7 Troubleshooting

Common Problems

Reasons why the cordless transducers may not work properly are given below, along with suggested
actions to take:
Possible Reasons
Base station cannot tune into a free channel.
Out of available channels. For example, after
excluding "problem" frequencies, only two
channels are available, but you want to use three
transducers.
The transducer has a serial number of zero (not
a valid number) and error E5 is displayed on the
base station.
Two transducers have the same serial number
and error E5 is displayed on the base station.
Two or more transducers use the same
frequency. Reasons:
• There is more than one fixed frequency base
station with the same channel spacing.
OR
• There are two or more transducers
programmed with the same fixed frequency.
General incompatibility: for example, an ISM
band transducer is being used with a WMTS
band receiver.
Communication error (always results in an
inoperative transducer).
Is the transmitter out of range?
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Action
Check the antenna. Is it correctly and securely
attached to the base station?
Scan for RF interference (see "Scanning the Available
Frequency Range" on page 69).
Exclude frequency ranges with RF interference (see
"Excluding Frequencies" on page 70).
Fix the RF frequency used by the system (see "Base
Station with Fixed Frequency" on page 70).
Check if it is possible to get more free channels. As a
workaround, you could alternate the use of one of the
channels between US and ECG.
Assign a valid serial number to the transducer by using
the Service Support Tool with a valid access code (see
Service Support Tool Help).
Change the serial number of one of the transducers by
using the Service Support Tool with a valid access
code (see Service Support Tool Help), or replace one of
the transducers with one from another base station.
• Change the base stations' base frequency and/or
the channel spacing (see Service Support Tool Help).
OR
• Assign different fixed frequencies to each
transducer (see Service Support Tool Help).
Ensure hardware and software compatibility.
Communication errors cannot be checked using the
Service Tool.
1. Check contacts (see page 67).
2. Reset the system (see page 61).
3. If reset fails, replace the transducer.
4. If problem persists, replace the base station.
Determine the effective operating range of the system
in your particular environment, and inform the patient
to stay within this area while monitoring takes place.
See "Range Definition" on page 67.
Common Problems