Honeywell HC900 manual Module Good

Diagnostics and Troubleshooting - User Interface

Table 27 - Controller Module Diagnostics

OI Screen	OI Screen	Number of	Possible Cause	Control File Action	User Action
Item	Item Value	LED
		Strobes
MODULE 1	GOOD	N/A	N/A	N/A	N/A
through
MODULE 16
	HI CJ	6	Possible causes of	1. Associated AI blocks	1. Improve ventilation
	TEMPERAT		this diagnostic are:	that are configured as	to rack
	URE		1. One of the two CJs	T/Cs set their fail pin	2. Replace AI module
				on, their warn pin off,
			on the module is
				and their output pin to
			indicating a
				the failsafe value.
			temperature reading
				2. Associated AI blocks
			greater than 70
			degrees C.	that are configured as
			2. Both cold-junction	T/Cs set their IO status
				to “CJ High
			sensors are failing to
				Temperature” for
			convert.
				reason 1 or “CJ Failure”
			3. The CJs are
				for possible causes 2
			converting properly,	and 3.
			but their differential	3. Associated rack
			is greater than 10
				monitor block’s module
			degrees C.
				fail pin is turned on.
				4. Associated rack
				monitor block’s RACK
				OK pin is turned off.
				5. Associated rack
				monitor block’s
				HITEMP pin is turned
				on.
				6. ASYS block’s HITEMP
				pin is turned on.
				7. ASYS block’s HW OK
				pin is turned off.
	WRONG	6	The module does not	1. Associated blocks set	1. Verify configuration
	MODULE		agree with the module	their fail pin on, their	2. Replace module with
			required for the	warn pin off, and their
					the correct one.
			control scenario.	output pin to the
				failsafe value.
				2. Associated blocks set
				their IO status to
				“Channel No Comm”.
				3. Associated rack
				monitor block’s module
				fail pin is turned on.
				4. Associated rack
				monitor block’s RACK
				OK pin is turned off.
				5. ASYS block’s HW OK
				pin is turned off.

126	HC900 Hybrid Controller Installation and User Guide	Revision 5
		9/03