Troubleshooting Guide

DISCONNECT ALL POWER TO UNIT BEFORE REMOVING
COVER.
STEP 1
ELECTRICAL CONNECTION
MODELS 21-24-27 ARE SUPPLIED WITH A 6 PRONE TERMINAL BLOCK
MARKED (L1 L1) (L2 L2) (L3 L3). MODEL 18 IS SUPPLIED WITH A
4 PRONE TERMINAL BLOCK MARKED (L1 L1) (L2 L2)
EACH ONE OF THE CONNECTION SETS MUST BE CONNECTED TO AN IN-
DEPENDENT DOUBLE POLE 40 AMP BREAKER. L1-L1 GOES TO ONE 40
AMP DOUBLE POLE BREAKER, L2-L2 GOES TO ANOTHER 40 AMP DOUBLE
POLE BREAKER AND L3-L3 TO ANOTHER 40 AMP DOUBLE POLE BREAKER.
YOU MUST ENSURE THE SET OF WIRES FROM EACH LEG ARE NOT
CROSSED AT THE BREAKERS OTHERWISE THE UNIT WILL NOT FUNCTION
AS DESIGNED. IN ORDER TO MAKE SURE THE WIRING IS CONNECTED
CORRECTLY PERFORM THE FOLLOWING TEST.
DISCONNECT ALL BREAKERS AT THE
SERVICE PANEL. ONCE ALL BREAK-
ERS HAVE BEEN DISCONNECTED
MEASURE THE VOLTAGE GOING TO
EACH ONE OF THE SETS (L1 L1) (L2
L2) (L3 L3 ) ALL SHOULD READ 0
VOLTAGE.
NOW– TURN ON 1 BREAKER, IT
DOES NOT MATTER WHICH ONE.
ONCE ONE BREAKER HAS BEEN
TURNED ON, USING YOUR VOLTME-
TER PLACE ONE PROBE ON L1 AND THE OTHER PROBE ON THE OTHER
L1, MEASURE ACROSS (L1-L1) YOU SHOULD GET A READING OF 208-
240V. DO THE SAME FOR (L2-L2) AND (L3-L3)
IF YOU MEASURE VOLTAGE ACROSS
ONE OF THE LEGS IN A SET AND
VOLTAGE IN ANOTHER LEG OF AN-
OTHER SET, THEN YOUR WIRES AT
THE BREAKERS ARE CROSSED AND
MUST BE CORRECTED. EXAMPLE–
L1-L1 READS NO VOLTAGE, BUT L1-
L2 GIVES YOU VOLTAGE READING,
THEN YOUR WIRES AT THE BREAK-
ERS ARE CROSSED AND MUST BE
FIXED.
PERFORM THIS VOLTAGE READING ON ALL LEGS OF TERMINAL BLOCK
BOTH AT THE BOTTOM AND TOP OF TERMINAL BLOCK TURNING ON 1
BREAKER AT A TIME.
IF POWER GOING TO THE UNIT IS NOT CORRECT, THE UNIT WILL NOT
OPERATE CORRECTLY, SO IT IS IMPORTANT TO PERFORM THIS TEST
FIRST, BEFORE PROCEEDING .
THE PROBLEM MIGHT NOT BE AT THE UNIT, BUT AT YOUR ELECTRICAL
PANEL , OR BREAKERS.
NOW THAT WE HAVE VERIFIED THAT THE ELECTRICAL CONNECTIONS
ARE CORRECT, LETS CONTINUE.