PATH freewatt HDJ, Installation, Operation & Maintenance Manual, Page: 47 / 68

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16.1 Troubleshooting Tools
Voltmeter with settings to check: 240 VAC, 120 VAC, •
24 VAC and 12 VDC;
Continuity Tester;
•
Contact Thermometer; (Non-Contact Infrared •
Thermometer)
Manometer with range of 0 to 20” of water column.
•
Laptop Computer Loaded with MINT Software Tool. •
16.2 Initial Service Checks
Verify appropriate 120 VAC and 240 VAC circuit •
breakers at main service panel are ON. Check outdoor
disconnect switch, where applicable, is ON.
Verify 240 VAC and 120 VAC electric service switches
•
are turned ON.
Check for 120 VAC (minimum 108 VAC to 132 VAC) to
•
system.
Check for 240 VAC (minimum 216 VAC to 264 VAC) to
•
Honda MCHP.
Verify thermostat in Heat Mode.
•
Verify thermostat is calling for heat on system control. •
If not, inspect thermostat connections to ensure proper
contact.
Verify external safety controls are installed and working
•
properly.
Verify natural gas supply valve is open at gas meter,
•
manual shutoff valves and gas control valve. Gas
pressures are maximum of 10” w.c. (natural gas)
or 14” w.c. (propane) with no fl ow or with system
operating and minimum of 4” w.c.(natural gas) or 10”
w.c. (propane) with gas fl owing at maximum fi ring rate
of freewatt PLUS boiler (verify during system startup
with boiler and Honda MCHP operating simultaneously).
Check wire connectors at control module, boiler control
•
and Honda MCHP are securely plugged in or connected.
If any component does not function properly, verify it is
•
correctly installed and wired before replacing it.
Static electricity discharge can damage control module
•
and boiler control. Touch metal surface to discharge
static electricity before touching either control.
The control module and boiler control cannot be
•
repaired. If either or both controls malfunction, the
control unit must be replaced.
Only trained, experienced service technicians •
should service control systems. Follow “Sequence
of Operation” for normal light off sequence after
troubleshooting.
If two consecutive controls appear to fail or appear
•
defective, control is probaly not defective. Another
problem may give appearance controls are defective
or fail (for example, electrical short burning out
transformer).
Check coolant tubing extending from Honda MCHP
•
to Hydronic Hybrid Integration Module is securely
connected and not plugged or damaged.
Check coolant operating temperature. Using MINT
•
tool, confi rm coolant entering MCHP unit is in range of
152-154° F. Check coolant tank in Hydronic Hybrid
Integration Module verify fi lled to above MIN. level line.
(Preferred level is just below MAX line.)
16 - TROUBLESHOOTING
WARNING
Fire, explosion or risk of shock hazard may cause
severe injury or death. Do not attempt to modify
characteristics of this home heating appliance in any
way.
!