CeilAir DX Series Betreibershandbuch PDF herunterladen (Seite 48)

(Mar, 2012)

CeilAiR OHS Series Installation, Operation & Maintenance Manual

ir Technology Systems, Inc.

SYMPTOM PROBABLE CAUSE RECOMMENDATION

Condenser Pressure Too High 2. Valves not open or partially open.

(Cont.) Repair/replace as needed.

3. Air in system - bleed system.

4. Check all strainers and clean if

needed.

i. Water/glycol solution not mixed prior Remove solution and premix.

to adding to system. Reﬁ ll system.

Condenser Pressure a. Loss of refrigerant (indicated by Locate and repair leak. Recharge

too Low bubbles in sight glass). system.

b. Condenser fan controls not set Adjust or repair controls.

properly.

c. Water regulating valve adjusted Readjust to 240-250 psig.

too low.

Noisy Compressor a. Expansion valve stuck in open Ensure feeder bulb is tight on suction

position (abnormally cold suction line). line. Check operation and superheat.

b. Broken compressor valve Replace compressor.

(compressor knocking, suction

pressure rises faster than 2lbs/min

after shutdown).

c. Worn or scarred compressor bearings. Replace compressor.

d. Liquid slugging. System overcharged.

Reclaim excess refrigerant.

e. Scroll compressor not properly Phase correctly at main power

phased. source. DO NOT REWIRE

COMPRESSOR.

Compressor Fails to Start a. Thermostat set too high. Adjust to desired temperature.

b. Compressor internal protector Check compressor for short circuit

is open. or ground.

c. Complete loss of refrigerant charge Locate and repair leak. Recharge

(low pressure safety switch). system.

d. Condenser pressure too high (high Check condenser for obstructions.

pressure safety switch).

System Short of Capacity a. Low refrigerant (indicated by Check for leaks Repair and

bubbles in sight glass). recharge system.

b. Expansion valve stuck or obstructed Remove valve and clear obstruction

(short cycling or continuous running). or replace valve.

c. Clogged drier/strainer (feels cold). Replace with new drier/ strainer.

d. Reduced airﬂ ow. and evaporator Check belt tension, ﬁ lters.

coil.

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