Lennox EMEA MONOTOP R290, Инструкция по установке, эксплуатации и обслуживанию

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Three-phase voltage protector ZHRV5-10
3.11. P1, P2, P3, P4 ALARM
Indicative of non-detection of the probe in the analog input
Possible causes:
1. Connection defective probe in the terminal or corresponding terminal according to alarm. Detect bad
contact
Example; Alarm P1, check the connection as well as the contact of the cable tips that enters terminals 01-02.
If the alarm is maintained, change connection 01 through connection 03, if alarm P1 disappears and alarm
P2 appears, it means deteriorated probe P1, replace probe P1, and return to original connection, P1
terminal 01, P2 terminal 03.
2. If the exchange between connection 01 and 03 was made, the P1 alarm is maintained, the analogue input
deteriorated, change the microprocessor.
Rest of alarm probes; perform the same analysis to determine cause.