Greenheck Fan 473501 manual Unit Protection Module UPM Fault Indications, Lockout Reset

Unit Protection Module (UPM) Fault Indications

Each unit includes one Unit Protection Module (UPM) printed circuit board and each UPM has two LED indictor lights.

LED	LED Fault Indication
Color

Lockout Reset

A hard lockout can be reset by turning the unit thermostat off and then back on when the “RESET” dip switch is set to “Y” or by shutting off unit power at the circuit breaker when the “RESET” dip switch is set to “R”.

Green	Power LED indicates 18-30 VAC present at
	the board
	Dual or	# of
	Single		Status
		blinks
	Compressor
		1	High pressure lockout
			Compressor 1
		2	Low pressure lockout
			Compressor 1
		3	High pressure lockout
			Compressor 2
		4	Low pressure lockout
	Dual		Compressor 2
	Compressor
		5	Freeze sensor lockout
			(optional item)
			Condensate overflow
Red		6	in coil drain pan
			(optional item)
			Brownout AC voltage
		7	to R and C terminal
			below 18 VAC
		1	High pressure lockout
		2	Low pressure lockout
		3	Freeze sensor lockout
			(optional item)
	Single
			Condensate overflow
	Compressor
		4	in coil drain pan
			(optional item)
			Brownout AC voltage
		5	to R and C terminals
			below 18 VAC

Intelligent Reset

If a fault condition is initiated, the five minute delay on break time period and the random start timer is initiated and the unit will restart after these delays expire. During this period the fault LED will indicate the cause of the fault. If the fault condition occurs 2 or 4 times (depending on 2 or 4 setting for Lockout dip switch) before 60 minutes, the unit will go into a hard lockout and requires a manual lockout reset. A single condensate overflow fault will cause the unit to go into a hard lockout immediately, and will require a manual lockout reset.

Your UPM board will come from the factory with the following default settings:

Default Settings

Freeze	NO
Temp	35°
Lockout	2
Reset	T
Alarm	CONT
Test	NO
Hot/Dry Alarm	HOT

Model ERCH-HP Energy Recovery Unit 27