Klimaire KTHM015-E5H2 PTAC Service Manual - Manual (Page 22)

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UNIT NOT COOLING/HEATING ROOM
 Unit air discharge section is blocked
 Temperature setting is not high or low
enough.
Note: Set point limits may not allow
the unit to heat or cool the room to
the temperature desired. Check
section on dip switch settings.
 Unit air filters are dirty.
 Room is excessively hot or cold when
unit is started.
 Vent door left open.
 Unit may be in a protection mode.
 Compressor is in time delay.
 Make sure that curtains, blinds or furniture are not restricting
or blocking unit airflow.
 Reset to a lower or higher temperature setting.
 Remove and clean filters.
 Allow sufficient amount of time for unit to heat or cool the room.
Start heating or cooling early before outdoor temperature, cooking
heat or gatherings of people make room uncomfortable.
 Close vent door.
 Check dipswitch settings for desired comfort.
 Wait approximately 3 minutes for compressor to start.
DISPLAY HAS STRANGE
NUMBERS/CHARACTERS ON IT
 The unit may be in a protection mode.
 The unit may be set for ℃ (instead of ℉).
UNIT MAKING NOISES
 Clicking, gurgling and whooshing noises are normal during
operation of unit.
WATER DRIPPING OUTSIDE
 If a drain kit has not been installed, condensation runoff during
very hot and humid weather is normal. See Note 2.
If a drain kit has been installed and is connected to a drain system,
check gaskets and fittings around drain for leaks and plugs.
WATER DRIPPING INSIDE
 Wall sleeve is not installed level
 Wall sleeve must be installed level for proper drainage of
condensation. Check that installation is level and make any
necessary adjustments.
ICE OR FROST FORMS ON INDOOR COIL
 Low outdoor temperature
 Dirty filters
 When outdoor temperature is approximately 55 ℉ or below, frost
may form on the indoor coil when unit is in Cooling mode. Switch unit
 to FAN operation until ice or frost melts.
 Remove and clean filters.
COMPRESSOR PROTECTION
 Power may have cycled, so
compressor is in a restart protection.
 Random Compressor restart-Whenever the unit is plugged in, or
power has been restarted, a random compressor restart will occur.
After a power outage, the compressor will restart after approximately
3 minutes.
 Compressor Protection-To prevent short cycling of the compressor,
there is a random startup delay of 3 minutes and a minimum
compressor run time of 3 minutes.
NOTES:
1. If circuit breaker is tripped or fuse is blown more than once, contact a qualified electrician.
2. If unit is installed where condensation drainage could drip in an undesirable location, an accessory drain kit should be
installed and connected to drain system.