York YOCC-YOHC 12-60 owner manual Test Operation, Troubleshooting Guide, Maximum Piping Lengths

DC Inverter R-410A

		INDOOR UNIT
	P Q (E)	L1 L2 L3 N
		Y/G
		3-core sheild cable
		Power supply
UNIT		3-Phase
	P Q (E)	380-415V~ (5-core cable 5x2.5mm2)
OUTDOOR	L N	Power supply
		1-Phase
		220-240V~ (3-core cable 3x2.5mm2)
	Y/G
	For 36000-60000 Btu/h
❥✱Maximum Piping Lengths

L

D

L

H

❥✱Refrigerant Piping

Connections (FLARE Connections)

To avoid alteration of unit capacities, check that piping lengths and changes in elevation are kept to a strict minimum.

Before connection the refrigerant lines, follow the procedures below (if precharged connection lines are not supplied):

–Select copper pipe diameters according to the size of unit to be installed.

–Install the refrigeration lines, checking that no foreign bodies get inside the piping.

–Install the flare connectors and flare the ends of the pipes.

Unit size	09	12	18	25	35	45	55	65
D (m)	12	15	15	22	22	26	26	26
L (m)	15	18	18	25	25	30	30	30
H (m)	10	12	12	20	20	24	24	24

Note : Where the difference in elevation between the indoor unit and the outdoor unit is greater than 5 meters, install an oil trap every 5 meters.

The suction line must have a 2% gradient up to the compressor on horizontal sections.

Where piping lengths are unusually long and include a large number of oil traps, it may be necessary to adjust to compressor charge.

Low Pressure	High Pressure
	Manifold

Gas Valve

Liquid Valve

Pressure Tap

Outdoor	Indoor
Unit	Unit
	Gas Line
	Liquid Line
	R-22/R-407C

Refrigerant charge to be added per extra metre of piping length when more than 7.5 meters.

Unit size		07	09	12	18	25	35	45	55	65
g/m	15	15	15	40	40	40	60	60		60

This unit is shipped complete with a charge of R-22/R-407C refrigerant that will be sufficient for an interconnecting piping length of 7.5 meters.

TEST OPERATION

CHECK THIS ITEM BEFORE START OPERATION

Outdoor

Check the flare nut connections, valve stem cap connections and service cap connections for gas leak with a leak detector or soap water.

Indoor

•Check the unit is firmly fixed.

•Check the connecting pipes are tighten securely.

•Check the pipe insulation.

•Check the drainage.

•Check the connection of the grounding wire.

TROUBLESHOOTING GUIDE

Problem		Probable cause		Remedy
A. The air conditioner does not	1.	Power Failure.	1.	Wait for Power resume.
run.	2.	Fuse blown or circuit breaker open.	2.	Replace the fuse or reset the breaker.
	3.	Voltage is too low.	3.	Find the cause and fix it.
	4.	Faulty contactor or relay.	4.	Replace the faulty component.
	5.	Electrical connections loose.	5.	Retighten the connection.
	6.	Thermostat adjustment too low (in heating mode) or too high	6.	Check Thermostat setting.
		(in cooling mode).	7.	Find the cause then replace Capacitor.
	7.	Faulty Capacitor.	8.	Check and retighten.
	8.	Incorrect wiring, terminal loose.	9.	Find the cause before reset.
	9.	Pressure switch tripped.
B. The outdoor fan runs but the	1.	Motor winding cut or grounded.	1.	Check the wiring and the compressor winding resistance.
compressor will not start.	2.	Faulty Capacitor.	2.	Find the cause then replace Capacitor.
C. There is insufficient heating or	1.	There is a gas leak.	1.	Remove charge, repair, evacuate and recharge.
cooling.	2.	Liquid and gas line insulated together.	2.	Insulate them separately.
	3.	The room was probably very hot (cool) when you started the system.	3.	Wait while unit has enough time to cool the room.
D. The compressor run	1.	Thermostat adjustment too low (in heating mode) or too high	1.	Check Thermostat setting.
continuously.		(in cooling mode).	2.	Check condenser air circulation.
	2.	Faulty fan.	3.	Find leak, repair and recharge.
	3.	Refrigerant charge too low, leak.	4.	Remove charge, evacuate and recharge.
	4.	Air or incondensables in refrigerant circuit.
E. The compressor starts but	1.	Too much or too little refrigerant.	1.	Remove charge, evacuate and recharge.
shuts down quickly.	2.	Faulty compressor.	2.	Determine the cause and replace compressor.
	3.	Air or incondensables in refrigerant circuit.	3.	Remove charge, evacuate and recharge.
	4.	Changeover valve damaged or blocked open (heat pump unit).	4.	Replace it.
F. Clicking sound is heard from	In heating or cooling operation any plastic parts may expand or shrink due to		In heating or cooling operation any plastic parts may expand
the air conditioner.	a sudden temperature change in this event, a clicking sound may occur.		or shrink due to a sudden temperature change in this event,
			a clicking sound may occur.