Bard PH1224, PH1230, PH1236 Trouble Shooting Guide, Symptom, Possible Causes, What to Check

TROUBLE SHOOTING GUIDE

Symptom	Possible Causes	What to Check	How to Check or Repair
Compressor contactor	Contil circuit wiring	Check for R connection at unit	Run R connection to outdoor unit to power heat
does not energize		and 24 volt between R-C.	pump control.
(heating or cooling)
	Compressor lock out	1. Check for 24V between	1. If no voltage between L1-C, turn thermostat off
		L1-C on heat pump control	and on again to reset high pressure switch.
		2. Check across high	2. If high pressure switch is open and will not reset,
		pressure switch.	replace high pressure switch.
	Compressor short cycle	Check for 24V between CC-C	If no voltage between CC-C, jumper speed up
	protection	and Y-C on heat pump	terminal, and within 10 seconds power should
		control.	appear between CC-C. Remove speed up jumper
			after 10 seconds.
	Heat pump control	Check all other possible	Replace heat pump control.
	defective	causes. Manual 2100-065.
	Contactor defective	Check for open or shorted	Replace contactor.
		coil winding.
Fan outdoor motor	Motor defective	Check for open or shorted	Replace motor.
does not run		motor winding.
(cooling or heating
	Motor capacitor defective	Check capacitor rating.	Replace capacitor.
except during defrost)
		Check for open or shorted
		capacitor.
	Heat pump control	Check across fan relay on	Replace heat pump control.
	defective	heat pump control. (Com-NC)
Reversing valve does	Reversing volve solenoid	Check for open or shorted	Replace solenoid coil.
not energize	coil defective	coil.
(heating only)
	Heat pump control	Check for 24V between RV-C	1. Check control circuit wiring.
	defective	and B-C.	2. Replace heat pump control
Unit will not go into	Temperature sensor or	Disconnect temperature	1. If unit goes through defrost cycle, replace
defrost	heat pump control	sensor from board and	temperature sensor.
(heating only)	defective	jumper across speed up
		terminals and sen jump	2. If unit does not go through defrost cycle, replace
		terminals. This should cause	heat pump control.
		the unit to go through a
		defrost cycle within one
		minute.
Unit will not come out	Temperature sensor or	Jumper across speed up	1. If unit comes out of defrost cycle, replace
of defrost	heat pump control	terminals. This should cause	temperature sensor.
(heating only)	defective.	the unit to come out of defrost	2. If unit does not come out of defrost cycle,
		within one minute.	replace heat pump control.

Manual 2100-344 Page 15