DeLUX DPX12T, Installation & Operation Manual

Page: 70 / 383

SECTION 9
9-2
01/01/2014
SYSTEM SEQUENCE ANALYSIS AND TROUBLESHOOTING
DP/DPSL, DPX/DPXSL, DPX4T, DPX8T, DPX12T AND DPX16GT SERIES MODELS
2014 MODELS
(GENERIC SCHEMATIC-STANDARD: 900-010712)
(GENERIC SCHEMATIC-WITH MOISTURELINK: 900-010713)
1A. SEQUENCE: MAIN CIRCUIT BREAKER "ON" * (230V-1P,240V-3P SYSTEMS) *
ACTION: MAIN POWER LIGHT "ON", APPLIES POWER TO HIGH VOLTAGE
CIRCUITS AND 120V CONTROL CIRCUIT BREAKER (CB1).
SYMPTOMS:
A. NO MAIN POWER LIGHT (DS1).
B. CONTROL CIRCUIT BREAKER (CB1) HAS TRIPPED.
POSSIBLE
CAUSES: A1. DEFECTIVE MAIN POWER LIGHT (DS1).
A2. DEFECTIVE CONTROL CIRCUIT BREAKER (CB1).
A3. DEFECTIVE FUSE IN MAIN PANEL DISCONNECT.
A4. MISSING 120 VOLT WIRE.
B1. SHORT CIRCUIT.
B2. OVERLOAD CONDITION HAS OCCURED.
B3. DEFECTIVE CONTROL CIRCUIT BREAKER (CB1).
CORRECTIVE
ACTION:
A1. CHECK TERMINAL #25 FOR 120 VOLTS. IF POWER IS
PRESENT THE MAIN POWER LIGHT (DS1) IS DEFECTIVE,
REPLACE.
A2. CHECK CIRCUIT BREAKER (CB1) FOR FAULT.
A3. CHECK ACROSS L1 & L3 (L2 ON 1P) ON THE MAIN POWER
DISTRIBUTION BLOCK. IF 240 VOLTS IS NOT PRESENT,
CHECK MAIN PANEL DISCONNECT FOR POWER AND IF FUSES
ARE DEFECTIVE, REPLACE. (WILD LEG IS ON L2 - 3P
ONLY)
A4. IF VOLTAGE IS PRESENT ACROSS L1 & L3 (L2 ON 1P) ON
THE MAIN POWER DISTRIBUTION BLOCK, CHECK TO SEE IF
THE BLACK WIRE IS CONNECTED FROM L1 ON THE MAIN
POWER DISTRIBUTION BLOCK TO THE POSITIVE SIDE ON
THE 120V PANEL POWER DISTRIBUTION BLOCK (TB2). ALSO
CHECK TO SEE THAT THE GROUND LEAD (GREEN WIRE) IS
CONNECTED TO CHASSIS GROUND AND THE COMMON LEAD OF
THE INCOMING POWER SOURCE IS CONNECTED TO CHASSIS
GROUND.
B1. REPAIR OR REPLACE BURNED OR BARE WIRING IN CONTACT
WITH CHASSIS OR OTHER WIRING.
B2. CHECK CURRENT FOR ANY OVERLOAD CONDITIONS AND
CORRECT.
B3. INSPECT CIRCUIT BREAKER (CB1) FOR DEFECT. REPLACE.