ZOLL PD 1400 Operator's Manual page 65

Troubleshootina Guides
NO apparent energy delivery to patient.
Check for "ELECTRODE OFF" or "PADDLE OFF" message on monitor.
W Perform defibrillator self test as described in Chapter 8.
W If test fails, have the unit serviced promptly.
W If DefibIPace electrodes are used, ensure proper placement and contact.
W Under certain circumstances, some patients will not "twitch" when energy is
delivered.