APC UTS6H Specifications download pdf (Page 47)

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

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.

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APC UTS6H Specifications Page 47

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