Protection And Error Conditions - Honeywell S4965V3250 Functional Description

Title: Functional description S4965V3250

6.8 - Protection and error conditions

Several checks are included to protect the boiler and its environment. High Limit switch is constantly monitored, safety
times are constantly compared etc.
Any violation of (programmable) limits (and/or internal thermostat functions) will lead to an error/fault or warning condition.
Severe error will cause a lockout condition which can only be cleared by the reset key on the controller itself. Blocking error
will be resolved automatically if the cause of the error disappeared.
In case of lockout and blocking conditions, Fan will not operate.
Error codes can be divided in 2 groups:

Lock-out condition codes;

Blocking condition codes.
Complete list of errors of the controller is given as following table:
Error Code Description
LOCK-OUT
1 Flame lockout after ignition trials
2 False Flame indication
3 High Limit error
4 APS related errors
5 Fan Tacho signal error
8 Flame circuit error
9 Gas valve drive circuit error
13 Remote reset lockout (volatile)
21 ADC error
25 CRC error
BLOCKING
26 Reset Knob error
34 Low supply voltage error
The meaning / explanation of the error numbers is as following:
First issue.
SW update and add parameter into list ModBus communication.
Description
Heating & Cooling Appliance Controls
Doc.: S4965V3250E20
Sign. E.C.N.
I.Mariscak 0131527
I.Mariscak
Honeywell
Date Rev.
27-Jun-2016 A
03-Aug-2016 B
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