Crown CSHB60-90XE Excessive noise, Evidence of Moisture, Perform Moisture Check, Don’T

All installations and services must be performed by qualified service personnel.

		• Verify fan is not in delay mode – wait until delay
			complete
		• “R” missing/not connected at motor
	• Stays at high CFM	• “R” missing/not connected at motor
		• Is fan in delay mode? – wait until delay time
			complete
	• Blower won’t shut off	• Current leakage from controls into G,Y or W?
	Excessive noise	• Determine if it’s air noise, cabinet, duct or motor
			noise – interview customer, if necessary
	• Noisy blower or cabinet	• Check for loose blower housing, panels, etc.
		• High static creating high blower speed?
			Check for air whistling thru seams in ducts,
			cabinets or panels
			Check for cabinet/duct deformation
	• “Hunts” or “puffs” at high CFM (speed)	• Does removing panel or filter reduce “puffing”?
			Reduce restriction
			Reduce max airflow
Evidence of Moisture
	• Motor failure or malfunction has occurred and	• Replace motor and perform Moisture Check
	moisture is present
	• Evidence of moisture present inside air mover	•	Perform Moisture Check
	DO		DON’T
	• Check-out motor, controls, wiring and	• Automatically assume the motor is bad.
	connections thoroughly before replacing motor
	• Orient connectors down so water can’t get in	• Locate connectors above 7 and 4 o’clock
	Install “drip loops”		positions
	• Use authorized motor and control model #’s for	• Replace one motor or control model # with
	replacement		another (unless an authorized replacement)
	• Keep static pressure to a minimum:	• Use high pressure drop filters – some have ½”
	Recommend high efficiency, low static		H2O drop!
	filters	•	Use restricted returns
	Recommend keeping filters clean
	Design ductwork for min static, max
	comfort
	Look for and recommend ductwork
	improvement, where necessary, in
	replacement
	• Size the equipment wisely	• Oversize system then compensate with low
			airflow
	• Check orientation before inserting motor	• Plug in power connector backwards
	connectors	•	Force plugs

Moisture Check

•Connectors are orientated “down” (or as recommended by equipment manufacturer)

•Arrange harnesses with “drip loop” under motor

•Is condensate drain plugged?

•Check for low airflow (too much latent capacity)

•Check for undercharged condition

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