Trane YCZ036F1/3M0B, YCZ035F1 Checkout Procedure, Ign Led Diagnostic Indicator, System Faults

	IGN LED DIAGNOSTIC INDICATOR
FLASHING SLOW	NORMAL CALL FOR HEAT
CONTINUOUS ON	NORMAL
CONTINUOUS OFF	CHECK POWER / INTERNAL FAILURE
2 FLASHES	SYSTEM LOCKOUT ( NO FLAME )
3 FLASHES	PRESSURE SWITCH PROBLEM
4 FLASHES	HIGH LIMIT (TCO) OPEN
5 FLASHES	FLAME SENSED WITH GAS VALVE OFF
6 FLASHES	FLAME ROLLOUT SWITCH (FL) OPEN
7 FLASHES	W1 & W2 SWAPPED

p

CHECKOUT PROCEDURE

TROUBLESHOOTING CHART

SYSTEM FAULTS

REFRIGERANT CIRCUIT

Liquid Pressure Too high

Liquid Pressure Too Low

Suction Pressure Too High

Suction Pressure Too Low

Liquid Refrigerant floodback (TXV System) Liquid Refrig. floodback (Cap. Tube System)

I. D. Coil Frosting

Compressor Runs Inadequate or No Cooling

ELECTRICAL

Compressor & O.D. fan Do Not Start Compressor Will Not Start But O.D. Fan Runs O.D. Fan Won't Start

Compressor Hums But Will Not Start

Compressor Cycles on IOL

I.D. Blower Won't Start

P-PRIMARY CAUSES S-SECONDARY CAUSES

Page 21