LAARS HP-M2 Series - Installation, Operation and Maintenance Instructions - Manual (Page 29)

H Series Page 29
PURGE - SEE FIGURE 26
VALVE SEE FIGURE 28
1. LIMIT CIRCUIT OPEN
SEE FIGURE 25
2. NO CALL FOR HEAT/
HOT WATER
REPLACE BOILER
CONTROL
2400-224
REPLACE TRANSFORMER
AND RUN BOILER
THROUGH A FEW CYCLES
HAVE QUALIFIED
ELECTRICIAN
REPAIR FAULT IN
WIRING TO THE
BOILER
CHECK FOR VOLTAGE (24
VAC) BETWEEN YELLOW
WIRES AT BACK OF "VAC
24 XFMR" CONNECTOR
ON BOILER CONTROL
1. IS SERVICE SWITCH ON?
2. IS CIRCUIT ON?
3. ARE FUSES OR CIRCUIT
BREAKER OK?
CORRECT AND
RECYCLE BOILER
THROUGH A FEW
CYCLES
CHECK FOR VOLTAGE
(120 VAC) BETWEEN
BLACK AND WHITE
WIRES AT BACK OF "120
VAC" CONNECTOR ON
BOILER CONTROL
DID BOILER RUN THROUGH
A COMPLETE CYCLE AS
DESCRIBED IN SEQUENCE
OF EVENTS ON PAGE 25
PUMP OPERATES
(120 V TO PUMP) REFER TO
FIGURE 30
YES NO
YES
NO
0 VOLTS
120
VOLTS
0
VOLTS
24
VOLTS
* POOR SWITCH CONTACT ON RELAYS, ZONE VALVES, OR THERMOSTATS CAN CAUSE A FLASHING GREEN
LIGHT ON JOHNSON CONTROLS G856DBG - 5201.
AFTER 5 MINUTES ARE ANY
RED LIGHTS FLASHING
YES NO
REFER TO FLOW
CHART FOR SPECIFIC
PROBLEM
YES
GREEN LIGHT COMES ON О
Р
RESET BOILER CONTROL BY INTERRUPTING
POWER AT SIDE OF UNIT FOR 15 SECONDS
Р Р
NO
Р
Р
Р
Р
Р
YES
Р
Р
Р
Р
О
О
NO
Figure 24. General Trouble Shooting.
OUT OF
PRODUCTION