Troubleshooting; Before Calling For Service - LG R5TT20F-SA1 Engineering Product Data Book

Heat Pump Water Heater

. Troubleshooting

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Before Calling for Service

Please check the following before you contact the service center. If the problem persists, contact
your local service center.
!
CAUTION
For your safety, Do not attempt to repair of electrical wiring, controls, heating elements
or other safety devices. Refer repairs to qualified service personnel
Problem
Insufficient or no
hot water
Water is too hot
- 50 Hz ( R134a)
Possible Causes & Corrective Action
Water usage exceeds the capacity of the water heater in current mode
• Wait for the water heater to recover after an abnormal demand.
• Change the mode for higher recovery.
Water temperature set too low
• See the "Water Temperature Adjustment" section.(Page 38)
ECO tripped
• See "Safety Controls" section.(Page 35)
No electric supply to the water heater
• Check the electric supply to water heater. See "Making Electrical
Connections" section.(Page 34)
Water connections to unit are reversed
• Re-install water connection correctly
Leak in hot water faucets or plumbing system
• Make certain all faucets are closed.
• Check home for any leaks and repair
Improper electric wiring
• See "Making Electrical Connections" section.(Page 34)
Cold water inlet temperature may be lower in winter
• This is normal. The colder inlet water takes longer to heat.
Dirty air filter
• See "Air Filter Maintenance" section.(Page 42)
Not enough clearance to air exchange for heat pump
• Make sure unit has enough clearance. See "Select the best Location"
section.(Page 29)
Open fuse or a circuit breaker tripped
• Replace fuse or reset circuit breaker.
Water temperature set too high
• See the "Water Temperature Adjustment" section.(Page 38)
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