Carrier HS070-160 manual Symptoms

TROUBLESHOOTING

SYMPTOMS

Compressor does not run

CAUSE		REMEDY
Power	line open	Reset	circuit breaker.
Control	fuse	Check	control	circuit
o p e n		for ground or		short.
		Replace fuse.
Safety thermostat		Move	RUN/STANDBY
tripped	(DGT)	switch	to STANDBY,
		then back to RUN.

SYMPTOMS CAUSE I REMEDY

Unit operates long or continuously

Tripped power breaker

lating pump not

Improperly wired controls

Low line voltage

Compressor motor defective

Seized compressor

Check the controls. Find cause of trip and reset breaker.

Check wiring and rewire.

Check line voltage - determine location of voltage drop and remedy deficiency.

Check motor winding for open or short. Replace compressor,

i f necessary.

Reolace comPressor.

Service load

System Noises

Compressor noisy	1 Check valve plates
	for valve noise.

ReDlace comDressor (w&n bearings)

Check for loose compressor hold- down bolts.

Compressor loses oil

Compressor cycles off on toss of charge

Compressor shuts down on high-pressure control

Loss of charge control 1 Repair leak; erratic in action

I-

Low refrigerant charge Add refrigerant.

High-pressure control Replace control. erratic in action

Compressor discharge Open valve, or re-

valve partially closed place if defective.

Air in system 1 Purge.

Condenser scaled Clean condenser.

Receiver not properly Repipe as required,

vented - refrigerant providing adequate

backs up into evap venting. condenser

Condenser water pump Start pump- repairor

or fans not operating replace if defective.

				relay	contacts.
Frosted			Expansion valve	Check	cooler and
suction line
	Hot liquid line
Frosted liquid
line			restricted
			Restricted	Remove restriction
			filter drier
Compressor		will
not unload

control valve

Compressor will not load

control valve
Plugged strainer	Clean or replace
(high side)	strainer.

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