Heat Controller HTD, HTV CXM Process Flow Chart, CXM Functional Troubleshooting Flow Chart, Start

Installation, Operation & Maintenance HTV/HTD/HTH SERIES Heat Controller, Inc.

CXM Process Flow Chart

WARNING!

WARNING! HAZARDOUS VOLTAGE! DISCONNECT ALL ELECTRIC POWER INCLUDING REMOTE DISCONNECTS BEFORE SERVICING.

Failure to disconnect power before servicing can cause severe personal injury or death.

		Start
		Did Unit
		Attempt to
		Start?
			Yes
		Did Unit
		Lockout at
		Start-up?
			No
See “Unit	Yes	Unit Short
short
		Cycles?
cycles”
			No

CXM Functional Troubleshooting Flow Chart

No			Check Main
		power (see power
				problems)
Yes
					Check fault LED code
						on control board
	See HP					See	See FP1
						LP/LOC	Fault
		Fault
						Fault

No fault

shown

Replace

CXM

See “Only Yes Fan Runs”

See “Only Yes

Comp

Runs”

See “Does No not Operate

in Clg”

Only Fan

Runs?

No

Only

Compressor

Runs?

No

Did unit lockout after a period of operation?

No

Does unit operate in cooling?

Yes

See FP2	See	See Over/
Fault	Condensate	Under
	Fault	Voltage

Yes

Unit is OK!

‘See Performance

Troubleshooting’ for

further help

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